Sodium Thiosulfate, Anhydrous

Hypo: Sodium Hyposulfate

SX0820

Analytical reagent.

800-424-9300 CHEMTREC (USA)613-996-6666 CANUTEC (Canada)24 Hours/Day: 7 Days/Week

3/4/2003

5/3/2004

Material Safety Data Sheet

Product Name

Synonym

Material Uses

Manufacturer

Product Code

Effective Date

Print Date

In Case of Emergency Call

Section 1. Product and Company Identification

For More Information Call856-423-6300 Technical ServiceMonday-Friday: 8:00 AM - 5:00 PM

Chemical Family Inorganic salt

EMD Chemicals Inc.P.O. Box 70480 Democrat RoadGibbstown, NJ 08027Prior to January 1, 2003 EMD Chemicals Inc. was EMIndustries, Inc. or EM Science, Division of EM Industries,Inc.

Section 2. Composition and Information on Ingredients

SODIUM THIOSULFATE 7772-98-7 100

Component CAS # % byWeight

Absorbed through skin. Eye contact. Inhalation. Ingestion.

Emergency Overview

Medical ConditionsAggravated byOverexposure:

Repeated or prolonged exposure is not known to aggravate medical condition.

Section 3. Hazards Identification

Routes of Entry

Potential Acute Health Effects

Potential Chronic Health Effects

May be hazardous in case of inhalation.

May be hazardous in case of eye contact (irritant).

May be hazardous in case of ingestion.

May be hazardous in case of skin contact (irritant). Skin inflammation is characterized byitching, scaling, reddening, or, occasionally, blistering.

Eyes

Skin

Inhalation

Ingestion

Physical State andAppearance

Solid. (Powder or crystals)

WARNING !.MAY BE HARMFUL IF SWALLOWED.MAY CAUSE RESPIRATORY TRACT, EYE AND SKIN IRRITATION.

This material is not known to cause cancer in animals or humans.Carcinogenic Effects

Additional information See Toxicological Information (section 11)

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Do NOT induce vomiting unless directed to do so by medical personnel. Never give anythingby mouth to an unconscious person. If large quantities of this material are swallowed, call aphysician immediately. Loosen tight clothing such as a collar, tie, belt or waistband.

Check for and remove any contact lenses. In case of contact, immediately flush eyes withplenty of water for at least 15 minutes. Cold water may be used. Get medical attention.

In case of contact, immediately flush skin with plenty of water. Cover the irritated skin with anemollient. Remove contaminated clothing and shoes. Cold water may be used.Wash clothingbefore reuse. Thoroughly clean shoes before reuse. Get medical attention.

If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult,give oxygen. Get medical attention.

Section 4. First Aid MeasuresEye Contact

Skin Contact

Inhalation

Ingestion

Not applicable.

Non-flammable.

Not applicable.

Not applicable.

Not applicable.

Not applicable.

Not applicable.

Thermal decomposition may release toxic and/or hazardous gases.

Risks of explosion of the product in presence of static discharge: No.

Risks of explosion of the product in presence of mechanical impact: No.

Not available.

Section 5. Fire Fighting MeasuresFlammability of theProduct

Auto-ignitionTemperature

Flash Points

Flammable Limits

Products of Combustion

Fire Hazards in Presenceof Various Substances

Explosion Hazards inPresence of VariousSubstances

Fire Fighting Mediaand Instructions

Special Remarks on FireHazards

Special Remarks onExplosion Hazards

Not applicable.Protective Clothing (Fire)

Section 6. Accidental Release MeasuresUse appropriate tools to put the spilled solid in a convenient waste disposal container.

Use a shovel to put the material into a convenient waste disposal container. Finish cleaning byspreading water on the contaminated surface and allow to evacuate through the sanitarysystem.

Small Spill and Leak

Large Spill and Leak

Spill Kit Information No specific spill kit required for this product. Contain and collect spillage with non-combustibleabsorbent materials, e.g. sand, earth, vermiculite, diatomaceous earth, and place in containerfor disposal according to local regulations (see section 13). ALWAYS CONTACT PERMITTEDWASTE DISPOSER (TSD) TO ASSURE COMPLIANCE WITH ALL CURRENT LOCAL,STATE AND FEDERAL REGULATIONS.

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Keep container tightly closed. Keep container in a cool, well-ventilated area.

Avoid contact with eyes, skin and clothing. Do not ingest. Avoid breathing dust. Keepcontainer closed. Use only with adequate ventilation. Wash thoroughly after handling.

Section 7. Handling and StorageHandling

Storage

Use process enclosures, local exhaust ventilation, or other engineering controls to keepairborne levels below recommended exposure limits. If user operations generate dust, fume ormist, use ventilation to keep exposure to airborne contaminants below the exposure limit.

Splash goggles. Full suit. Dust respirator. Boots. Gloves. A self-contained breathingapparatus should be used to avoid inhalation of the product. Suggested protective clothingmight not be sufficient; consult a specialist BEFORE handling this product.

SODIUM THIOSULFATE Not available.

Section 8. Exposure Controls/Personal ProtectionEngineering Controls

Personal Protection inCase of a Large Spill

Product Name Exposure Limits

Dust respirator. Be sure to use an approved/certified respirator or equivalent.

Splash goggles.

Lab coat.

Gloves.

Not applicable.

Personal ProtectionEyes

Body

Respiratory

Hands

Feet

Protective Clothing(Pictograms)

Decomposes.

Solid. (Powder or crystals)

Not available.

Not available.

1.667 (Water = 1)

Not available.

Not available.

Not available.

158.11 g/mole

Odorless.

Colorless to white

Boiling/CondensationPoint

Melting/Freezing Point

Not available.

Section 9. Physical and Chemical Properties

Physical State andAppearance

Molecular Weight

pH

Specific Gravity

Vapor Pressure

Vapor Density

Odor Threshold

Evaporation Rate

Odor

Color

Na2S2O3Molecular Formula

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Sodium Thiosulfate, Anhydrous Page: 4/6SX0820Not available.

Soluble in water.

LogKow

Solubility

The product is stable.

Highly reactive with oxidizing agents, acids.Reactive with metals.

Will not occur.

Na2O, SOx

Hygroscopic; keep container tightly closed.

Section 10. Stability and ReactivityStability and Reactivity

Conditions of Instability

Incompatibility withVarious Substances

Hazardous DecompositionProducts

Hazardous Polymerization

Incompatibile with Iodine, Mercury, Lead, Silver Salt. Incompatible with heavy metals.Rem/Incompatibility

LD50: Not available.LC50: Not available.

Contains material which may cause damage to the following organs: mucous membranes.

Section 11. Toxicological Information

Toxicity

Chronic Effects onHumans

Acute Effects on Humans May be hazardous in case of eye contact (irritant). May be hazardous in case of skin contact(irritant). Skin inflammation is characterized by itching, scaling, reddening, or, occasionally,blistering. May be hazardous in case of inhalation. May be hazardous in case of ingestion.

Synergetic Products(Toxicologically)

Not available.

Irritancy Draize Test: Not available.

Sensitization Not available.

Carcinogenic Effects This material is not known to cause cancer in animals or humans.

Toxicity to ReproductiveSystem

Not available.

Teratogenic Effects Not available.

Mutagenic Effects Not available.

RTECS Number: Sodium Thiosulfate, Anhydrous XN6476000

Not available.

Not available.

The products of degradation are less toxic than the product itself.

Section 12. Ecological InformationEcotoxicity

BOD5 and COD

Toxicity of the Products ofBiodegradation

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Not available.

Material does not have an EPA Waste number and is not a listed waste, however consultationwith a permitted waste disposal site (TSD) should be accomplished.ALWAYS CONTACT A PERMITTED WASTE DISPOSER (TSD) TO ASSURE COMPLIANCEWITH ALL CURRENT LOCAL, STATE AND FEDERAL REGULATIONS.

EPA Waste Number

Treatment

Section 13. Disposal Considerations

Section 14. Transport InformationDOT Classification

TDG Classification

IMO/IMDGClassification

ICAO/IATAClassification

Proper Shipping Name: CHEMICALS, N.O.S.RQ: Not applicable.

Not available.

Proper Shipping Name: CHEMICALS, N.O.S.RQ: Not applicable.

Proper Shipping Name: CHEMICALS, N.O.S.RQ: Not applicable.

U.S. Federal Regulations

New Jersey: SODIUM THIOSULFATE

Section 15. Regulatory Information

California prop. 65: No products were found.

TSCA 8(b) inventory: SODIUM THIOSULFATE

Clean Water Act (CWA) 307: No products were found.Clean Water Act (CWA) 311: No products were found.Clean air act (CAA) 112 accidental release prevention: No products were found.Clean air act (CAA) 112 regulated flammable substances: No products were found.Clean air act (CAA) 112 regulated toxic substances: No products were found.

State Regulations

CEPA DSL: SODIUM THIOSULFATE

Australia (NICNAS): SODIUM THIOSULFATE

Germany water class: SODIUM THIOSULFATE

Japan (MITI): SODIUM THIOSULFATE

Korea (TCCL): SODIUM THIOSULFATE

Philippines (RA6969): SODIUM THIOSULFATE

WHMIS (Canada) Not controlled under WHMIS (Canada).

R36/38- Irritating to eyes and skin.DSCL (EEC)

International RegulationsSODIUM THIOSULFATE 231-867-5EINECS

International Lists

SARA 302/304/311/312 extremely hazardous substances: No products were found.SARA 302/304 emergency planning and notification: No products were found.SARA 302/304/311/312 hazardous chemicals: SODIUM THIOSULFATESARA 311/312 MSDS distribution - chemical inventory - hazard identification: SODIUMTHIOSULFATE: Immediate (Acute) Health HazardSARA 313 toxic chemical notification and release reporting: No products were found.

China: No products were found.

This product has been classifed in accordance with the hazard criteria of the Controlled ProductRegulations and the MSDS contains all required information.

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Section 16. Other Information

Notice to ReaderThe statements contained herein are based upon technical data that EMD Chemicals Inc. believes to be reliable, are offered forinformation purposes only and as a guide to the appropriate precautionary and emergency handling of the material by a properlytrained person having the necessary technical skills. Users should consider these data only as a supplement to other informationgathered by them and must make independent determinations of suitability and completeness of information from all sources toassure proper use, storage and disposal of these materials and the safety and health of employees and customers and theprotection of the environment. EMD CHEMICALS INC. MAKES NO REPRESENTATION OR WARRANTY OF ANY KIND,EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE, WITH RESPECT TOTHE INFORMATION HEREIN OR THE PRODUCT TO WHICH THE INFORMATION REFERS.

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National FireProtectionAssociation(U.S.A.)

Health

Specific Hazard

Reactivity

Fire Hazard

Changed Since LastRevision