aufgaben der stabsstelle sicherheitsingenieur — die ... · web viewact on the implementation of...

Institute/department:Building:Room/person responsible for the room:Work station/task:

Legal basis: Act on the Implementation of Measures of Occupational Safety and Health to Encourage Improvements in the Safety and Health Protection of Workers at Work (Arbeitsschutzgesetz), German workplace regulations (Arbeitsstättenverordnung), Technical Rules for Workplaces (Technische Regeln für Arbeitsstätten), Biological Agents Ordinance (Biostoffverordnung), Technical Rules for Biological Agents, Hazardous Substances Ordinance (Gefahrstoffverordnung), Technical Rules for Hazardous Substances, German Industrial Safety Regulation (Betriebssicherheitsverordnung), Technical Rules on Industrial Safety (Technische Regeln für Betriebssicherheit)

Description of workplace, work station or task:

Risk Completed *Measures/Comments Implementation yes no* n/a by

(name)before(date)

Basic informationOccupationalmedical precautionsRisk from, e.g. hazardous substances, work procedures which can

produce hazardous substances, noise, vibrations, working in moist/humid condi-

tions, wearing gloves overlonger periods,

computer work, infectious agents,

It was checked whether occupational medical pre-cautions are compulsory or must be offered.Occupational medical precautions are compulsoryfor:

Occupational medical precautions are offered for:

The employee is aware that occupational medical precautions are compulsory/offered at the univer-sity's in-house doctor.He/she is aware that advice is available from the Occupational Health and Safety Service.

Risk assessment for chemical laboratories

Risk Completed *Measures/Comments Implementation

yes no* n/a by(name)

before(date)

journeys to other (tropical) countries.

Subjects include setting up work stations, selecting personal safety equipment, glasses for computer screen use, work station ergonomics, risk assessment for pregnant women.

Work equipment(equipment, machines and op-erating equipment)

Work equipment is recorded in a list.Manufacturer's instruction manuals are available.Employees are instructed on which work equipment to use.It is ensured that the employees use the work equip-ment in accordance with the manufacturer's instruc-tion manual.Defective work equipment is taken out of service immediately and labelled accordingly.Employees have been instructed to report defects.Work equipment is regularly serviced in accordance with the manufacturer's guidelines.The type, scope and frequency of work equipment inspections have been determined.All work equipment is regularly inspected.

Operating instructions Instructions are available for applying work processes and operating work equipment, e.g. machines or experiment apparatus, that pose a risk to employees.Where necessary, instructions are produced in English and/or other languages to ensure that all employees understand the content of the operating instructions.

Fire prevention Open fire, naked flames and smoking areprohibited in work areas where there is a risk of fire and explosion.A sufficient number of fire extinguishers is provided and these are inspected every 2 years.There is a sufficient number of fire safety officers.Employees are regularly trained in fire prevention and emergencies.Current escape and rescue plans are displayed.Evacuation drills are performed.

First aid There is a sufficient number of first aiders.A first aid kit is available, within reach and access-



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ible to all.First aid posters are provided.The emergency brochure is displayed.A telephone can be reached quickly in an emer-gency.Antidotes, e.g. for hydrofluoric acid, and instructions on their use are kept available to be handed out to the rescue team.Employees are instructed to immediately report any accidents at work or while travelling to or from the workplace to their supervisor.

Emergencies when handling hazardous substances(accidents and incidents)

Emergency plans for accidents and incidents are provided.Appropriate measures, e.g. sirens, are used to en-sure that people in a hazardous situation are warned in a suitable, clear and unmistakable man-ner.Safety drills are performed on a regular basis.Chemical binders are kept available to clear up spillages of hazardous substances.Personal safety equipment is provided for emergen-cies.

Personalsafety equipment

Personal safety equipment is provided in line with the particular risk: safety goggles and visor, protective gloves to protect from spray, protective gloves that are proven to be sufficiently

chemically resistant to the particular hazardous substances used. The permeation time is ob-served.

flame resistant protective clothing when there is an increased fire risk,

protective clothing made of PVC-coated material when working with large amounts of corrosive liquid,

respiratory equipment if work involves exposure to hazardous substances in dangerous concentra-tions.

Personal safety equipment is stored correctly.Employees are trained how to use personal safety equipment.



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Employees are to ensure that they wear the per-sonal safety equipment.Personal safety equipment is inspected for visible defects before use.

Employees' qualifications Employees have the relevant qualifications to per-form their work duties.

Safety officers There is a sufficient number of safety officers.Safety officers are given the opportunity to do fur-ther training.

Instructions Employees are regularly provided with verbal in-structions, at least once a year.Instructions include general advice on occupational healthcare and toxicology.The instructions are documented.

Restricted access and working alone

Access to dangerous areas is restricted to certain members of staff.Laboratories that may also be subject to unauthor-ised access are always kept locked when no em-ployees are present.Dangerous work is not to be carried out alone, or if it is, additional organisational and technical measures are put in place for this.

Risks and stresses for particu-lar groups of people, e.g. young people, pregnant women, people with disabilities

Legal requirements, e.g. Youth Employment Protec-tion Law (Jugendarbeitsschutzgesetz), Maternity Protection Act (Mutterschutzgesetz) are adhered to.Members of the Representative Body for the Dis-abled are known and involved in decision-making.The Occupational Health and Safety Service is consulted.The Safety Engineering division is consulted.

Constructing and equipping laboratoriesThere are sufficient escape and rescue routes.Doors open in the direction of escape and are fitted with a window.The floor and floor covering, as well as cable guides running through these are waterproof.Desks have an impermeable covering, can withstand the demands of their intended use and are fitted with a raised edge.Surfaces are easy to clean, impermeable and resistant to the substances and cleaning materials



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used.A washbasin is installed in the work area.

Ventilation The room is fitted with adequate technical ventilation equipment that is effective at all times.An air exchange rate of 25 m³/h is adhered to.Ventilation systems are regularly serviced and repaired.Ventilation systems are regularly inspected.

Fume cabinets Fume cabinets are made of suitable materials that withstand expected mechanical, chemical and thermal demands.Fume cabinet windows that slide open vertically, especially the front sash windows, are prevented from falling down.A notice stating "Keep sash window closed" is displayed.Fume cabinets have their own independent equipment to monitor the proper functioning of the ventilation technology.(visual and acoustic alarms)Fume cabinets are to be inspected at least once a year.

Emergency body and eye wash Emergency body and eye wash is provided and labelled.Emergency body and eye wash is regularly inspected, at least once a month.

Documentation when handling hazardous substancesThe risk assessment is checked and, if necessary, extended, in the following cases: tasks involving new hazardous substances, changes to tasks or conditions, changes to occupational exposure limits, changes to legal requirements.A current hazardous substances register is provided.The current safety data sheets are available and accessible to employees.(This can be done electronically)All substances and preparations are classified using the safety data sheet.Substances and preparations made in the laboratory



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are classified and/or the risks have been determined.A substitution test has been performed and documented.

Risks from hazardous substances that are carcinogens, mutagens or toxic for reproduction. (known as CMR substances)

Using the risk assessment, it was determined whether employees are exposed to CMR substances.A record is kept of employees who, according to the risk assessment, are exposed to CMR substances.The record is to be stored for 40 years.(Guidelines are provided in the Technical Rule for Hazardous Substances 410 (TRGS 410))In work areas in which activities are performed with Category 1 or 2 hazardous substances that are carcinogens, mutagens or toxic for reproduction, the air pumped out is not pumped back into the work area without being cleaned.

Labelling All hazardous substance containers are labelled.(Storage in original containers or with simplified labelling for laboratories)

Handling hazardous substances in the labRisks from releasing hazardous substances

Work is carried out in closed systems if possible.Work is carried out in the fume cabinet.If it is not possible to work in the fume cabinet, hazardous substances are collected and extracted at the point of origin.Hazardous substances are only available in the lab in small quantities.Hazardous substances are stored in a clear system.Flammable liquids with a combustion point less than 55°C are only stored at work stations in containers up to 1 l maximum given volume for standard per-sonal use.Provision of flammable liquids only occurs in non break-proof containers up to 5 l or in other contain-ers up to 10 l in a safety cabinet.Containers holding hazardous substances are only stored at a height from which they can be safely removed and put down.(e.g. never higher than a grip height of170-175 cm)



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Hazardous substances that are no longer needed and empty containers which may still contain traces of hazardous substances are removed from the work station and correctly stored or disposed of.

Waste/disposal Waste containers are suited to the type of waste.Waste containers are sufficiently labelled.Waste containers are only stored in a closed way so that dangerous vapours or gases cannot escape into the room.Empty containers are adequately cleaned before they are disposed of or reused.Needles, syringes, pipette tips, snap ampoules, glass shards and other sharp objects must be collected and disposed of after use in stab-proof and unbreakable containers.

Occupational limit values(Limits in the Technical Rule for Hazardous Substances 900 (TRGS 900))

Occupational limit values are adhered to.When working with hazardous substances for which there are no occupational limit values, the effectiveness of the technical protective measures taken is inspected using suitable determination methods.

Work clothing and protective clothing

All employees wear a full length lab coat with long, close-fitting sleeves, safety goggles with adequate side protection and firm, closed and non-slip shoes in the lab.

Hygiene and cleanliness Workplaces are kept free of contamination and regularly cleaned.Work equipment, machines and containers are regularly cleaned.Food and drinks are not brought into the lab, cosmetics are not applied.The employees have an area outside of the lab in which they can store and consume their food and drinks.A skin protection plan has been produced.Skin protection, cleansers and moisturisers are provided.

Laboratory gases in fixed pipesRisks from uncontrolled release of gases flowing through fixed pressurised gas pipes, e.g.

Isolating valves that are quick to reach and easy to use are provided to cut off the gas supply.Isolating valves are kept clear at all times and are



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flammable lab gases, natural gas).

not obstructed.Pressurised gas pipes and isolating valves are clearly labelled with names of substances and the direction of flow.

Handling pressurised gas cylinders Risk of injury from pressurised

gas cylinders falling over Health risk from inhaling

released gas Creation of an explosive atmosphere by released gas

Small pressurised gas cylinders are used.(max. 50 l, or pressurised gas cylinders at max. 10 l or the smallest possible containers for extremely poisonous or CMR substances)Pressurised gas cylinders are stood outside of the lab or in a safety cabinet.If pressurised gas cylinders are stood in the lab, the room must display the warning sign "Warning - gas cylinders".(W029 according to ASR A1.3)After use in the lab, pressurised gas cylinders are returned to a safe place.Pressurised gas cylinders are chained up or preven-ted from falling over in another way.Fittings and other parts for highly oxidising pressur-ised gases are kept free from oils, fats and glycer-ine.The main valve or isolating valves are kept clear so that these are accessible at all times.

A visual and functional inspection of the tubes and manometers is carried out before starting work with and after connecting a new pressurised gas cylin-der.Valves on pressurised gas cylinders are closed after use.

Transporting pressurised gas cylinders

Only transport pressurised gas cylinders using suit-able trolleys and with the lid in place.Pressurised gas cylinders containing gases that are damaging to health, flammable or asphyxiating are not transported together with people in a lift.Transport containers display a warning sign "Do not enter - hazardous substance transport".

Cryogenic liquefied or asphyxiating gases When working with cryogenic Cryogenic liquefied gases are only filled or refilled in

well ventilated rooms or out in the open.



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liquefied gases individual body parts may get frostbite.

Asphyxiating gases canlower the oxygen levels in the air in the event of rapid vapor-isation (e.g. spilling cryogenic liquid nitrogen or helium) or intentional release (e.g. CO2 as emergency cooling for cryo-genic equipment). Dangerousoxygen deficiency existsat concentrations of< 17 vol% O2.

Oxygen can accumulatein open containers with cryo-genic nitrogen or heliumand cause explosive reactionswhen it comes into contactwith organic materials.

When working with cryogenicoxygen, there is an increasedfire risk.

Suitable transport containers are used and a visual inspection is carried out before use.Brittle rubber seals on Dewar flasks (between the insulated container and the covering) are replaced immediately.(The insulated container may otherwise break eas-ily.)Personal safety equipment is worn when pouring cryogenic liquefied gases:protective gloves against the cold, goggles, face shield.Containers holding cryogenic liquefied gases are not transported in lifts together with people.Transport containers display a warning sign "Do not enter - hazardous substance transport".Containers holding cryogenic liquefied gases are not transported in closed vehicles. Containers are suit-ably secured so that they cannot fall over during transport.The work room has an adequate, continually opera-tional technical ventilation system with an extraction system close to the ground.Ventilation systems are regularly inspected.The work room is equipped with an oxygen defi-ciency display system with a visual and acoustic signal.In the event of an oxygen deficiency, people are warned outside the room before they enter.The oxygen deficiency warning system is regularly inspected.Measures against oxygen accumulation are taken when handling cryogenic oxygen(significantly increased fire risk).

Dust and smokeHealth risk from breathing in smoke and dust particles.

Dangerous dust particles are not released.Dust particles are collected as thoroughly as possible at the source or release point and disposed of safely.Dust deposits are avoided.The room or equipment has a cleaning plan.The room or equipment is regularly cleaned.



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Dust particles are wiped up with damp towels or hoovered upusing an Ex-protected hoover with suitable filters.

Storing, pouring and transporting hazardous substancesRisk of fire or explosion from re-filling hazardous substances or storing them together

All hazardous substances are allocated a storage category.The Technical Rules for Hazardous Substances "Storage of hazardous substances in non-stationary containers" (TRGS 510) are adhered to.Stored hazardous substances and their containers areinspected as least once a year to check that they are in proper condition.Hazardous substances that are no longer needed or have become unusable are correctly disposed of.Hazardous substances are only handled and trans-ported in suitable, tightly sealed containers.Containers of hazardous substances that may re-lease dangerous or corrosive vapours must be stored in permanently extracted places.Entry points (doors) to the hazardous substance storage rooms must display the sign "No access for unauthorised people" (D-P006 according to ASR A1.3) on the outside.Static electricity when refilling containers is avoided by potential equalisation.Fume cabinets are not used to store hazardous substances.Liquid hazardous substances are placed in collecting basins that are big enough to at least hold the contents of the largest container.

Poisonous and extremely poison-ous substances and preparations, Category 1 or 2 hazardous sub-stances and preparations that are carcinogens, mutagens or are toxic for reproduction

Substances and preparations are kept locked away or stored in such a way that only qualified individu-als can access them.

Substances and preparations that fall under the German Narcotics Act (Betäubungsmittelgesetz)

Substances and preparations are kept locked away or stored in such a way that only qualified individu-als can access them.

Risk of fire or explosion

Lauren, 29/03/16,

http://www.baua.de/en/Topics-from-A-to-Z/Hazardous-Substances/TRGS/TRGS-510.html



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A check has been carried out as to whether dangerous amounts or concentrations of hazardous substances occur, which could lead to a risk of fire or explosion.There are no sources of ignition or conditions that can cause fires or explosions.

1. Mechanical risksExperimental setups, equipment and devicesRisks from mechanical devices, e.g. risk of clothing, hair or jewellery

getting pulled into rotating parts, risk of crushing from moving

parts, risk of injury from parts flying

out

Rotating or moving parts are fitted with a protective cover or protective isolation.There are shields to protect from parts flying out.Protective systems are not manipulated.There is no work carried out on running systems or protective covers that have been removed.Hazardous areas are labelled or blocked off.There is an emergency cutoff switch that is easy to reachNo loose flowing clothing is worn, long hair is covered, jewellery is not permitted.

Risks from active experiments, e.g. by leaving the workplace during

an experiment, when carrying out long-term

experiments.

Experiments are carried out in specially secure rooms, known as night labs.Particularly dangerous activities or activities which could pose risks in interaction with other activities are approved by the head of the lab before the activ-ity is started and with special written instructions.

Risks from instable experimental setups

Experiments are set up in a clear, stable way and without mechanical stresses.

Falling, slipping, trippingRisk of injury by/from e.g. uneven flooring, damaged areas, cables on the floor, restricted, obstructed

passageways/thoroughfaresby trolleys, shelves, cupboards.

Floors are even and non-slip, easy to clean and have no bulges, holes or other damage.Trip hazards are prevented, e.g. cables do not lie across passageways or are threaded through cable channels.Passageways are kept clear.Differences in height, e.g. steps or thresholds, are easily visible.

Ladders and stepladdersFall hazard Ladders and stepladders are inspected for visible



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defects before use.Ladders and stepladders are regularly inspected.Ladders and stepladders of adequate height are used.

2. Electrical risksRisks from electrical power, e.g. from defective electrical and operat-

ing equipment, such as cables or casing,

overloading socket extension leads,

Electrical and operating equipment is selected in accordance with its intended use.Electrical and operating equipment is inspected for visible defects before use.Electrical and operating equipment is regularly inspected.Electrical equipment is connected as directly as possible to the power socket.Several extension cables and/or multiple sockets are not connected in series.

3. Hazardous substances

4. Biological risks Breathing in biological aerosols Coming into contact with a bio-

logical agent via the skin, mu-cous membranes, eyes

Activities with a risk of injury

See the risk assessment for working with biological agents

5. Risk of fire or explosionFire loads Cardboard boxes and packaging material are dis-

posed of immediately after unpacking or collected in a separate room.

6. Hot or cold mediums or surfacesRisk of injury from burns or frost-bite

Pipes or components are protected so that they cannot be touched.Hot or cold products cannot escape uncontrollably.Hazardous areas are labelled with the warning sign"Warning - hot surface" or "Warning - low temperat-ures / cold / frost". (W017 and W010 according to ASR A1.3)A visual inspection of the containers, pipes or tubes is carried out before use to check for defects.

7. Risks from particular physical agentsNoise, ultrasound, infrasound



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Hearing difficulties from noise caused by working procedures, equipment or machinery

When purchasing new work equipment, the manufacturer's guidelines are observed.Noisy equipment is enclosed or stood in a separate area.An indicative measurement was performed.Suitable ear protection is offered as from 80 dB(A).Suitable ear protection is worn as from 85 dB(A).Noise zones are labelled with the mandatory sign "Wear ear protection".(M003 according to ASR A1.3)

Full body vibrations

Hand/arm vibrations

Using optical radiation (wave lengths from 100 nm to 1 mm)Skin inflammation and burns, as well as health impairment from ozone from artificial optical radi-ation, e.g. from☐ lasers,☐ UV light,☐ infrared light,☐ visible light

Has a risk assessment been carried out in accord-ance with the ordinance to protect employees from risks associated with artificial optical radiation (Ver-ordnung zum Schutz der Beschäftigten vor Gefähr-dungen durch künstliche optische Strahlung)?The working ordinance and Technical Rules for artificial optical radiation (Technische Regeln zu künstlicher optischer Strahlung) are known, dis-played in a suitable location and are implemented.

UV radiationA shield for the UV light source and a reflection cover are available.It is clear whether the UV radiation device is switched on or off.Ozone produced when using high power lamps is safely removed.Individuals are protected against hot UV sources.The warning sign "Warning - optical radiation" is put up at the entry points to the UV areas.(W027 according to ASR A1.3)There is a sufficient number of UV protective glasses, and they are worn where necessary.Protective clothing that covers the skin is available and is worn where necessary.Sun protection products are available.



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Laser beamsLasers are marked according to their class.A laser safety officer is appointed for laser equip-ment in the classes 3R, 3B and 4.Laser areas are separated off and all entry points have a warning sign saying "Warning - laser beams".(W004 according to ASR A1.3)A laser warning light is put up at the entrance to the laser area when using class 4 lasers.Protective measures are taken if dangerous gases, vapours, dust, explosive mixtures or fog can result from the effects of laser beams.Protective measures are taken if flammable sub-stances may ignite or an explosive atmosphere can result from the effects of laser beams.Protective measures are taken if secondary beams may result.Reflective surfaces are covered while using class 3R, 3B or 4 laser equipment.The useful beam is surrounded by an optically tight protective casing.There is a sufficient number of laser safety goggles in accordance with the laser device's energy levels and wave lengths.There is a sufficient number of skin protection gloves in accordance with the laser device's energy levels and wave lengths.

Risks from ionising radiationRadioactive substances / X-rays The responsible radiation safety officer and his/her

deputy in accordance with StrlSchV are known.Entry points to the radioactive area are labelled according to the Radiation Protection Ordinance (StrSchV).The necessary hazardous substances category signs are in place for the fire brigade.Category A individuals who are occupationally ex-posed to radiation receive annual occupational med-ical checkups.The individual doses are determined for people working in the control areas.



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The amount of exposure is kept as low as possible using technical measures.Radioactive materials are transported in suitable containers.Radioactive materials are stored in suitable contain-ers.All X-ray facilities have permission / a confirmation notice from the supervising authority.The operational log book for the X-ray machine and an up-to-date copy of the Röntgenverordnung (X-ray Regulation) are freely accessible.

Magnetic fieldsRisk from magnetic / electromag-netic fields, e.g. for people with pacemakers or

implants in the event of a fire, for the

rescue services when carrying air cylinders

The limits for electromagnetic fields are adhered to.Areas with magnetic fields are separated by defensive walls and access is restricted?The occurrence of inadmissibly high field strengths is avoided?Areas with magnetic fields are labelled with the warning sign "Warning - magnetic field".(W006 according to ASR A1.3)People with pacemakers, defibrillators and implants are not permitted to enter. No admittance is made clear by signs stating"No access for people with pacemakers or im-planted defibrillators" and "No access for people with metal implants". (P007 and P014 according to ASR A1.3)There is a notification for the fire brigade if the magnetic field could lead to a dangerous situation?

8. Risks from the working environmentIndoor climate conditions

Direct sunlight is prevented, e.g. through shutters or blinds.Minimum temperature levels are adhered to: 20°C for light work while sitting, 19°C for medium work while sitting, 19°C for light work while standing/walking around, 17°C for medium work while standing/walking

around.Work spaces can be adequately ventilated.Draughts are prevented.



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Work spacesRisks and stresses, e.g. inadequate space to work or

room for manoeuvre, inadequate or narrow passage-

ways.

The work stations provide adequate space to work.(At least 8 m² for a work station plus at least6 m² for each additional work station.)The work stations have at least1.5 m² room for manoeuvre. The depth of the room for manoeuvre is at least 1.0 m.The route to the individual work station is at least 0.6 m wide.Passageways are at least as wide as follows: 0.875 m for up to 5 people in the room, 1.00 m for up to 20 people in the room, 1.20 m for more than 20 to up to 200 people in

the room.LightingRisks and stresses, e.g. insufficient indoor lighting reflection and glare, difference in luminous colour

of bulbs,

The work spaces are lit in accordance with the work task at hand.(Minimum illumination for labs: 300 lx, for work stations: 500 lx)An indicative measurement was performed.There is no reflection or glare on computer screens and other work equipment.Blinds or shutters are in place to prevent glare from daylight.Lighting is regularly cleaned and inspected.Lighting is arranged so that it runs parallel to the principal line of vision.

Computer and office work stations in labsDesks The size of the desks is adjusted according to the

particular work task at hand.Computer work with written documents:Desk size at least 1.60 x 0.80 m (width x depth).Computer work without written documents:Desk size at least 1.20 x 0.80 m.Fixed desks:Desk height is 740 ± 20 mm.Adjustable desks:The desk can be adjusted from 650 to 850 mm in height.Sufficient legroom is providedDesks are secure and stable.



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Chairs All chairs are suitable for use in laboratories (flame retardant).Chairs are fitted with at least five castors.The castors are free-moving and suitable for the flooring.The chairs have a height adjustable backrest that follows the contours of the back.Backrests and seat heights can be adjusted to suit the users.Various sitting positions are possible.Operating instructions for the chairs are available.

Monitor, keyboard, mouse Monitors can be freely rotated and tilted.Monitors have a non-reflective surface.Brightness and contrast are adjustable.The size of the monitors is adjusted according to the work task at hand.Monitors are arranged so that the line of vision is parallel to the windows.The height of the keyboards is no more than 30 mm.The lettering on the keys stands out clearly from the background (preferably dark lettering on light background).The computer mouse is suitable for all users, e.g left-handed users.

9. Lifting, carrying and transporting loadsRisk of injury as a result of lifting and carrying heavy loads

Lifting and carrying heavy loads is done in groups.Transport aids such as carts, rollers, manual lifters or floor conveyors, are used to make transporting heavy objects easier.A visual inspection of the transport aids is carried out before use to check for defects.

10. Psychological stressHealth risk as a result of psycho-logical stress

Tasks and areas of responsibility are clearly desig-nated. (organisational chart, job description)Employees are involved in planningwork flows.Employees receive feedback on the work they have done.Tasks are in line with the employees' qualifications.



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Contractual working hours are adhered to.Overtime can be reduced quickly.The work can be done without frequent interruptions.Continually repetitive activities are not carried out.There are no or few work-related tensions or conflicts between employees.There are no problems with working together in a team.Sickness absence is low.

11. Operating equipment and apparatusGlass Dewar flasksRisk of cuts from glass shards in the event of implosions

Dewar flasks are equipped with a protective coating or secured in another way against the consequences of an implosion.Dewar flasks are only filled with cryogenic liquefied gases when they are clean and dry.Scratched Dewar flasks are not used for cryogenic liquefied gases.

Risk from mixtures with the ability to explode when enriching liquid nitrogen with oxygen

Limit the time that liquid nitrogen is left in open Dewar flasks.Using liquid oxygen or liquid air to freeze is not permitted.

Dispersers Risk of hazardous substances

being sprayed out or glass con-tainers breaking.

Burns from hot surfaces on the disperser tools.

Risk from freely rotating shafts or stirrers.

Containers are fixed with a holder.Before changing tools, it is ensured that the disperser tools have cooled down.Freely rotating shafts or stirrers are covered up while in motion.

Electric liquid heating bathsRisk of fire by heating liquids above the combustion point.

Risk of burns from splashing liquids, touching the hot outer cover

To heat liquid heating baths,only electric heating equipment is used.The safety temperature control is always set to at least 10K below the combustion point of the thermo-stating liquid being used.Heating baths are never used without a thermostat-ing liquid.Filling and emptying the baths is done when they



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have cooled down.Electric shaking water bathsRisk of fire Only operated under observation.

A timer is used.Release bathsRisk from vibrations Waves are calibrated.Gas burners, tubes and fittingsRisk of fire or explosionfrom gases escaping fromdefective Bunsen burners andtubes.

Burners and tubes are regularly inspected for signs of damage and defective (porous, hardened) tubes are replaced immediately.Tubes are secured with suitable clips or binders.Only gas tubes that have been approved by the DVGW for gas burners are used.

Risk of fire during the experiment,e.g. from gas burners tipping over, from substances nearby the

burner igniting, from working with several flam-

mable or highly flammable sub-stances at the same time.

Burners are placed securely on a fireproof base.The desk is cleared before the experiment.Any equipment that gets heated is not disposed of in the waste paper basket.

FreezersRisk of fire or explosion when placing flammable, highly flam-mable or explosive substances in the freezer

The freezer has a sign stating that "Storing flammable substances in this freezer is prohibited".

Glass containersRisk of cuts from broken glass Suitable protective gloves are provided for handling

glass containers.Defective glass items are immediately disposed of or handed in for repair.

Hot air blowersRisk of combustion from the hot air blower

Hot air blowers are not used in the vicinity of flammable liquids or vapours.

FridgesRisk of fire or explosion when placing flammable, highly flam-mable or explosive substances in the fridge

If flammable, highly flammable or explosive substances need to be cooled, an Ex-protection fridge is used.Fridges whose interior is not free from sources of ignition are identified with a sign stating "Storing



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flammable substances in this fridge is prohibited".Contamination of foodstuffs Food and drink are not stored in the fridges for

hazardous substances.Magnetic stirrerRisk of fire or explosion This equipment is not used in areas at risk of

explosions.No objects are inserted in the area between the heating or cover plate and the base.Air vents are not covered.

Scalding and burns from the heating plate and accessor-

ies, liquids and sample mediums.

Thermal gloves are available and are used.Heating plate, accessories, liquids or sample mediums are only touched once they have cooled down.

Risk for people with pacemakers, defibrillators and implants from the rotating magnetic field

The device is labelled with a warning sign.Employees are informed of the magnetic field.

When using glass covers, there is a risk of flying shards if the glass breaks.

The pressure in the glass cover is monitored.

Microwave: heating, incinerating, drying, macerating, as well as continual and batch-wise syntheses Burns from hot steam or hot

liquids. Risk of explosion when heating

flammable liquids. Risk of containers exploding, Risk to the eyes and skin from

emitted radiation, e.g. through defective door seals.

Radiation strength and length of heating is adjusted according to the substances.Boiling retardation is avoided when heating liquids.Only small quantities are used.Common lab microwaves with sensors for pressure and temperature control are used.Microwaves with additional safety features such as mechanical airing systems, Ex-sensors are used when heating flammable liquids.

Rotary evaporator Risk of hazardous substances

being sprayed out or glass con-tainers breaking.

Risk of clothing, hair or jew-ellery getting caught in moving parts.

Burns from hot glass parts.

It is ensured that the negative pressure that is prescribed for the solvent is adhered to.Solvents that tend to form peroxides are checked before distilling until drying for any existing peroxides, which are then removed.The rotary evaporators are completely encased or all glass parts are coated with plastic to reduce the risk in the event of an implosion or explosion.

Mechanical shakers



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Risk of flying shards if the glass breaks.

Risk of hazardous substances being sprayed out or glass con-tainers breaking.

Containers are fixed to the shaking plate using at-tachments.Plastic containers are used where possible.It is ensured that shaking containers are closed firmly.The shaking frequency is adjusted to suit the me-dium used.

Dishwasher Risk from skin contact when

refilling acids or alkalines Scalding from hot steam when

the door is opened too early Burns when removing rinsed

containers Risk of cuts from broken glass.

When refilling acids or alkalines, a lab coat, goggles and chemical resistant gloves are worn.Employees wait for the dishwasher to cool down before removing the contents.Protective gloves are worn when removing hot or broken objects.

Sterilising autoclave: sterilisation with steamBurns from hot steam hot liquids

Pressure indicators are checked before opening.Objects are only removed when they have cooled down.Personal safety equipment is worn, e.g. protective gloves.

Risk from germs in the event of inadequate sterilisation

Time and temperature are adjusted to suit the autoclave substances.Bioindicators are regularly added to the sterilised products which show whether the contents of the autoclave have been completely sterilised.

Drying ovensRisk of burning from hot surfaces, e.g. on the drying oven on sample holders

Oven gloves or silicone protection is used when putting samples in the oven or removing them.

Risk of fire if the oven is filled incorrectly (applies especially to Memmert drying ovens).

Manufacturer's instruction manuals are observed.

Risk from harmful vapours or gases.

Drying ovens with an extractor are used and set up according to the manufacturer's instructions.

Ultrasonic bathsThe ultrasonic bath is placed upright on a firm, dry



before(date)

base.A cleaning agent that is not labelled as a hazardous substance is used.Ultrasonic baths are kept closed when in use.Open ultrasonic baths are used in the fume cabinet.

Vacuum devicesRisk of casing or components exploding, e.g. glass shards

Pressure containers are inspected for visible signs of damage before use.Pressure containers are regularly inspected.(In accordance with the Industrial Safety Regulation (Betriebssicherheitsverordnung), Appendix 2, Section 4)

Vacuum pumps Extracted gases are fed over a cooling trap so that they cannot end up in the vacuum pump's oil.

Centrifuges Risk from flying parts if the cent-

rifuge breaks Noise when in use.

Centrifuges are set up on a flat surface andthere is a clear area of at least 30 cm around thecentrifuge.Operating instructions are available.Centrifuges are inspected in a disassembled state, at least every three years.(This does not apply to lab centrifuges for centri-fuged material that is not explosive or flammable, with kinetic energy of up to 10,000 Nm or up to 500 W rated power.)Additional requirements for ultracentrifuges:An operational log book is kept for ultracentrifuges.Employees who handle ultracentrifuges are listed by name.Ultracentrifuges are inspected in a disassembled state, at least once a year.

It is necessary to produce an explosion protection document: ☐ yes ☐ no

Comments:In Section 2 (7) of the Hazardous Substances Ordinance, Section 2 (9) of the Biological Agents Ordinance and Section 2 (4) of the Industrial Safety Regulation (Be-triebssicherheitsverordnung), pupils, students and other people, particularly those working at scientific institutions, who work with hazardous substances, biological agents or work equipment, are equal to employees.

Risk assessment filled out by: ____________________ __________ ____________________ Name Date Signature

The measures are checked for effectiveness together with the regular check of the validity of the risk assessment.

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