=====================  Product Identification  =====================

MSDS NAME:SODIUM TETRATHIONATE DIHYDRATE, S5758
NIIN:00N093154
Status Code:A
MSDS Number: CJXJZ
=== Responsible Party ===
Company:SIGMA CHEMICAL CO
Box:14508
City:ST LOUIS
State:MO
ZIP:63178
Country:US
Info Phone Num:314-771-5765
Emergency Phone Num:314-771-5765
CAGE:21076
=== Contractor Identification ===
Company:SIGMA CHEMICAL COMPANY
Address:3050 SPRUCE ST
Box:14508
City:ST LOUIS
State:MO
ZIP:63178
Country:US
Phone:314-771-5765
CAGE:21076

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

Name:SODIUM TETRATHIONATE DIHYDRATE
CAS:13721-29-4
RTECS #:XF6470000
= Wt:100.

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

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 AND SKIN IRRITATION. TO
    THE BEST OF MFR KNOWLEDGE, THE CHEMICAL, PHYSICAL, AND
    TOXICOLOGICAL PROPERTIES HAVE NOT BEEN THO ROUGHLY INVESTIGATED.
    ADDITIONAL INFORMATION: INGESTION RESULTS IN IRRITATION OF THE
    GASTROINTESTINAL TRACT. LARGE DOSES MAY CAUSE VIOLENT COLIC AND
    DIARRHEA, CIRCULATORY DISTURBANCES, CENTRAL NERVOUS  SYSTEM
    DEPRESSION AND EVEN DEATH. PERSON WITH ALLERGIES AND/OR ASTHMA MAY
    EXHIBIT HYPERSENSITIVITY TO SULFITES.
Effects of Overexposure:SEE HEALTH HAZARDS.

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

First Aid:IN CASE OF CONTACT, IMMEDIATELY FLUSH EYES WITH COPIOUS
    AMOUNTS OF WATER FOR AT LEAST 15 MINUTES. IN CASE OF CONTACT,
    IMMEDIATELY WASH SKIN WITH SOAP AND COPIOUS AMOUNTS OF WATER. IF
    INHALED, REMOVE T O FRESH AIR. IF BREATHING IS DIFFICULT, GIVE
    OXYGEN. IF SWALLOWED, WASH OUT MOUTH WITH WATER PROVIDED PERSON IS
    CONSCIOUS. CALL A PHYSICIAN. WASH CONTAMINATED CLOTHING BEFORE
    REUSE.

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

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

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

Spill Release Procedures:WEAR NIOSH APPRVD SELF-CONTAINED BREATHING
    APPARATUS , RUBBER BOOTS AND HEAVY RUBBER GLOVES. SWEEP UP, PLACE
    IN A BAG AND HOLD FOR WASTE DISPOSAL. AVOID RAISING DUST. VENTILATE
    AREA AND WASH SPILL SIT E AFTER MATERIAL PICKUP IS COMPLETE.

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

Handling and Storage Precautions:DO NOT BREATHE DUST. AVOID CONTACT
    WITH EYES, SKIN AND CLOTHING. AVOID PROLONGED OR REPEATED EXPOSURE.
    IRRITANT. KEEP TIGHTLY CLOSED. REFRIGERATE.
Other Precautions:ADDITIONAL INFORMATION: MAY DECOMPOSE WHEN HEATED.

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

Respiratory Protection:WEAR APPROPRIATE NIOSH APPROVED RESPIRATOR.
Ventilation:MECHANICAL EXHAUST REQUIRED.
Protective Gloves:CHEMICAL-RESISTANT GLOVES.
Eye Protection:ANSI APPROVED CHEMICAL WORKERS GOGGLES .
Other Protective Equipment:ANSI APPROVED EYE WASH & DELUGE SHOWER .
    OTHER PROTECTIVE CLOTHING.
Work Hygienic Practices:WASH THOROUGHLY AFTER HANDLING.
Supplemental Safety and Health
WASTE DISP METH: BY RATE OF ADDITION. OBSERVE ALL FEDERAL, STATE AND
    LOCAL ENVIRONMENTAL REGULATIONS.

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

Spec Gravity:2.100
Appearance and Odor:WHITE POWDER.

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

Stability Indicator/Materials to Avoid:YES
STRONG ACIDS.
Stability Condition to Avoid:MAY DECOMPOSE WHEN HEATED.
Hazardous Decomposition Products:SULFUR OXIDES.

===================  Toxicological Information	===================

Toxicological Information:SEE HEALTH HAZARDS. RTECS #: XF6470000.
    TETRATHIONIC ACID, DISODIUM SALT, DIHYDRATE. TARGET ORGAN DATA:
    KIDNEY, URETER, BLADDER (CHANGES IN TUBULES). ONLY SELECTED
    REGISTRY OF TOXIC EFFECTS OF CHEMICA L SUBSTANCES (RTECS) DATA IS
    PRESENTED HERE. SEE ACTUAL ENTRY IN RTECS FOR COMPLETE INFORMATION.

=====================  Ecological Information  =====================

Ecological:DATA NOT YET AVAILABLE.

====================  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. HYDR OLYSIS & NEUTRALIZATION RXNS MAY GENERATE
    HEAT & FUMES WHICH CAN BE CONTROLLED (SUPDAT)

===================  MSDS Transport Information  ===================

Transport Information:CONTACT SIGMA CHEMICAL COMPANY FOR TRANSPORTATION
    INFORMATION.

=====================  Regulatory Information  =====================

Federal Regulatory Information:EUROPEAN INFORMATION. CAUTION: SUBSTANCE
    NOT YET FULLY TESTED. IRRITANT. R 36/37/38 IRRITATING TO EYES,
    RESPIRATORY SYSTEM AND SKIN. S 26 IN CASE OF CONTACT WITH EYES,
    RINSE IMMEDIATELY WITH PLENTY OF  WATER AND SEEK MEDICAL ADVICE. S
    36 WEAR SUITABLE PROTECTIVE CLOTHING.
State Regulatory Information:

=======================  Other Information  =======================

 Disclaimer (provided with this information by the compiling agencies):
 This information is formulated for use by elements of the Department
 of Defense.  The United States of America in no manner whatsoever,
 expressly or implied, warrants this information to be accurate and
 disclaims all liability for its use.  Any person utilizing this
 document should seek competent professional advice to verify and
 assume responsibility for the suitability of this information to their
 particular situation.

*** END OF RECORD ***