ALDRICH CHEMICAL CO INC./SUB OF SIGMA-ALDRICH CORP -- 21726-3 SODIUM THIOSULFATE, 99%  -- 6810-01-446-5186
<pre>=====================  Product Identification  =====================

Product ID:21726-3 SODIUM THIOSULFATE, 99%
MSDS Date:11/28/1995
FSC:6810
NIIN:01-446-5186
=== Responsible Party ===
Company Name:ALDRICH CHEMICAL CO INC./SUB OF SIGMA-ALDRICH CORP
Address:1001 W. ST. PAUL AVE
Box:355
City:MILWAUKEE
State:WI
ZIP:53201
Country:US
Info Phone Num:414-273-3850/FAX -4979
Emergency Phone Num:414-273-3850
CAGE:60928
=== Contractor Identification ===
Company Name:ALDRICH CHEMICAL CO INC
Address:1001 WEST ST PAUL AVE
Box:355
City:MILWAUKEE
State:WI
ZIP:53233
Country:US
Phone:414-273-3850
CAGE:60928

=============  Composition/Information on Ingredients  =============

Ingred Name:SODIUM THIOSULFATE
CAS:7772-98-7
RTECS #:XN6476000
Fraction by Wt: 99%
Other REC Limits:NONE RECOMMENDED

=====================  Hazards Identification  =====================

LD50 LC50 Mixture:NONE SPECIFIED BY MANUFACTURER.
Routes of Entry: Inhalation:YES  Skin:YES  Ingestion:YES
Reports of Carcinogenicity:NTP:NO    IARC:NO	OSHA:NO
Health Hazards Acute and Chronic:MAY BE HARMFUL BY INHAL/INGEST OR SKIN
    ABSORPTION.CAUSES EYE/SKIN IRRIT.MATLS IS IRRIT TO MUCOUS MEMBRANES
    & UPPER RESPIRATORY TRACT.TO THE BEST OF OUR KNOWLEDGE
    CHEM/PHSY/TOXICOLOGICAL PROPERTIES HAV E NOT BEEN THOROUGHLY
    INVESTIGATED.
Effects of Overexposure:HARMFUL BY INHAL/INGEST/SKIN
    ABSORPTION.EYE/SKIN/MUCOUS MEMBRANES/UPPER RESPIRATORY TRACT IRRIT.
Medical Cond Aggravated by Exposure:NONE SPECIFIED BY MANUFACTURER.

=======================  First Aid Measures  =======================

First Aid:IN CASES OF CONTACT IMMED FLUSH EYES W/COPIOUS AMTS OF WATER
    FOR @LEAST 15MINS.IN CASE OF CONTACT IMMED WASH SKIN W/COPIOUS AMTS
    OF WATER.IF INHAL REMOVE TO FRESH AIR.IF NOT BREATHING GIVE ART
    RESP.IF  BREATHING IS DIFFICULT GIVE OXYGEN.IF SWALLOWED WASH OUT
    MOUTH W/WATER PROVIDED PERSON IS CONSCIOUS.CALL DR.

=====================  Fire Fighting Measures  =====================

Flash Point:NON-COMBUSTIBLE
Lower Limits:NP
Upper Limits:NP
Extinguishing Media:USE EXTINGUISHING MEDIA APPRORIATE TO SURROUNDING
    FIRE CONDITIONS.
Fire Fighting Procedures:WEAR SELF-CONTAINED BREATHING APPARATUS &
    PROTECTIVE CLOTHING TO PREVENT CONTCT W/SKIN/EYES.
Unusual Fire/Explosion Hazard:EMITS TOXIC FUMES UNDER FIRE CONDITIONS.

==================  Accidental Release Measures  ==================

Spill Release Procedures:WEAR SELF-CONTAINED BREATHING APPARATUS,RUBBER
    BOOTS & HEAVY RUBBER GLOVES.SWEEP UP PLACE IN BAG & HOLD FOR WASTE
    DISPOSAL.AVOD RAISING DUST.VENTILATE AREA & WASH SPILL SITE AFTER
    MATERIAL PICKUP IS C OMPLETE.
Neutralizing Agent:NONE SPECIFIED BY MANUFACTURER.

======================	Handling and Storage  ======================

Handling and Storage Precautions:DONT BREATHE DUST.AVOID CONTACT
    W/EYE/SKIN/CLOTHING.AVOID PROL/REP EXPOSURE.IRRITANT.KEEP TIGHTLY
    CLOSED.HYGROSCOPIC.STORE IN COOL DRY PLACE.
Other Precautions:AVOID CONTACT W/ACID.

=============  Exposure Controls/Personal Protection  =============

Respiratory Protection:WEAR APPROPRIATE NIOSH/MSHA APPROVED RESPIRATOR.
Ventilation:MECHANICL EXHAUST REQUIRED.
Protective Gloves:CHEM-RESISTANT GLOVES
Eye Protection:SAFETY GOGGLES
Other Protective Equipment:OTHER PROTECTIVE CLOTHING.SAFETY SHOWER &
    EYE BATH.
Work Hygienic Practices:WASH CONTAMINATED CLOTHING BEFORE REUSE.WASH
    THOROUGHLY AFTER HNDLG.
Supplemental Safety and Health
DISPOSAL:HYDROLYSIS & NEUTRALIZATION RXS MAY GENERATE HEAT & FUMES
    WHICH CAN BE CONTROLLED BY RATE OF ADDITION.

==================  Physical/Chemical Properties  ==================

HCC:N1
Boiling Pt:B.P. Text:NP
Melt/Freeze Pt:M.P/F.P Text:NP
Decomp Temp:Decomp Text:NP
Vapor Pres:NP
Vapor Density:NP
Spec Gravity:1.667
pH:NP
Evaporation Rate &amp; Reference:NP
Solubility in Water:NP
Appearance and Odor:WHITE CRYUSTALLINE POWDER
Percent Volatiles by Volume:NP
Corrosion Rate:NP

=================  Stability and Reactivity Data  =================

INCOMPATABLE W/LEAD,SILVER & MERCURY SALTS,AND IODINES. STRONG ACIDS,
    STRONG OXIDIZING AGENTS.
Stability Condition to Avoid:PROTECTIVE FROM MOISTURE.
Hazardous Decomposition Products:SURLFUR OXIDES

====================  Disposal Considerations  ====================

Waste Disposal Methods:OBSERVE ALL LOCAL, STATE AND FEDERAL ENVIRO
    REGULATIONS.SM QUANT:CAUTIOUSLY ADD TO LG STIRRED EXCESS OF
    WATER.ADJUST PH TO NEUTRAL SEPARATE ANY INSOLUBLE SOLIDS OR LIQ &
    PKG THEM FOR HAZ WASTE DISPO.F LUSH AQU SOLN DOWN DRAIN W/PLENTY OF
    WATER(SUPPLE)

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