ALDRICH CHEMICAL CO -- SODIUM THIOSULFATE PENTAHYDRATE, 99.5% ACS  -- 6810-00-234-8380
<pre>=====================  Product Identification  =====================

Product ID:SODIUM THIOSULFATE PENTAHYDRATE, 99.5% ACS
MSDS Date:03/20/1991
FSC:6810
NIIN:00-234-8380
=== Responsible Party ===
Company Name:ALDRICH CHEMICAL CO
Box:355
City:MILWAUKEE
State:WI
ZIP:53201
Country:US
Info Phone Num:414-273-3850
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, PENTAHYDRATE
CAS:10102-17-7
RTECS #:WE6660000
Fraction by Wt: 99.5%

=====================  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:ACUTE:MAY BE HARMFUL BY INHALATION,
    INGESTION OR SKIN ABSORPTION. CAUSES EYE & SKIN IRRITATION. TO THE
    BEST OF OUR KNOWLEDGE, THE CHEMICAL, PHYSICAL & TOXICOLOGICAL
    PROPERTIES HAVE NOT BEEN THOROUGHLY  INVESTIGATED. TARGET
    ORGANS:LUNGS, THORAX OR RESPIRATION (CYANOSIS).
Explanation of Carcinogenicity:NOT RELEVANT
Effects of Overexposure:SEE HEALTH HAZARDS.
Medical Cond Aggravated by Exposure:NONE SPECIFIED BY MANUFACTURER.

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

First Aid:EYES:IMMEDIATELY FLUSH W/COPIOUS AMOUNTS OF WATER FOR AT
    LEAST 15 MINUTES. SKIN:IMMEDIATELY WASH W/SOAP & COPIOUS AMOUNTS OF
    WATER. WASH CONTAMINATED CLOTHING BEFORE REUSE. INHAL:REMOVE TO
    FRESH AIR.	IF NOT BREATHING GIVE ARTIFICIAL RESPIRATION. IF
    BREATHING IS DIFFICULT, GIVE OXYGEN. INGEST:WASH OUT MOUTH W/WATER
    PROVIDED PERSON IS CONSCIOUS. CALL MD.

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

Extinguishing Media:NONCOMBUSTIBLE. USE EXTINGUISHING MEDIA APPROPRIATE
    TO SURROUNDING FIRE CONDITIONS.
Fire Fighting Procedures:WEAR NIOSH/MSHA APPROVED SCBA & FULL
    PROTECTIVE EQUIPMENT .
Unusual Fire/Explosion Hazard:EMITS TOXIC FUMES UNDER FIRE CONDITIONS.

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

Spill Release Procedures:WEAR NIOSH/MSHA APPROVED SCBA, RUBBER BOOTS &
    HEAVY RUBBER GLOVES. SWEEP UP, PLACE IN A BAG & HOLD FOR WASTE
    DISPOSAL. AVOID RAISING DUST. VENTILATE AREA & WASH SPILL SITE
    AFTER MATERIAL PICKUP IS COM PLETE.
Neutralizing Agent:NONE SPECIFIED BY MANUFACTURER.

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

Handling and Storage Precautions:DO NOT BREATHE DUST. AVOID CONTACT
    W/EYES, SKIN & CLOTHING. AVOID PROLONGED OR REPEATED EXPOSURE.
    IRRITANT. KEEP TIGHTLY CLOSED. HYGROSCOPIC.
Other Precautions:AVOID CONTACT W/ACID. STORE IN A COOL DRY PLACE.

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

Respiratory Protection:WEAR APPROPRIATE NIOSH/MSHA APPROVED RESPIRATOR.
Ventilation:MECHANICAL EXHAUST REQUIRED.
Protective Gloves:CHEMICAL-RESISTANT GLOVES.
Eye Protection:CHEMICAL WORKERS GOGGLES .
Other Protective Equipment:OTHER PROTECTIVE CLOTHING. SAFETY SHOWER &
    EYE BATH.
Work Hygienic Practices:WASH THOROUGHLY AFTER HANDLING.
Supplemental Safety and Health
MFR'S TRADE NAME/PART NO:REAGENT, 21724-7. WASTE DISP METH:WHICH CAN BE
    CONTROLLED BY THE RATE OF ADDITION. OBSERVE ALL FEDERAL, STATE &
    LOCAL ENVIRONMENTAL REGULATIONS.

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

Spec Gravity:1.729
Appearance and Odor:WHITE CRYSTALS.

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

Stability Indicator/Materials to Avoid:YES
STRONG ACIDS, STRONG OXIDIZING AGENTS. INCOMPAT W/LEAD, SILVER &
    MERCURY SALTS, & IODINES.
Stability Condition to Avoid:NONE SPECIFIED BY MANUFACTURER.
Hazardous Decomposition Products:SULFUR OXIDES.

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

Waste Disposal Methods:FOR SM QTYS:CAUTIOUSLY ADD TO LG STIRRED EXCESS
    OF WATER. ADJUST PH TO NEUTRAL, SEPARATE ANY INSOL SOLIDS/LIQS &
    PACKAGE THEM FOR HAZ-WASTE DISP. FLUSH AQUEOUS SOLN DOWN DRAIN
    W/PLENTY OF WATER. HYDRO LYSIS & NEUT RXNS MAY GEN HEAT & FUMES
    (SUPDAT)

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