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Section 1: Product Identification
   Chemical Name:       Potassium hydrogen sulfide, anhydrous, min. 95%    
   CAS Registry Number:       1310-61-8    
   Formula:       HKS    
   EINECS Number:       215-182-9    
   Chemical Family:       metal chalcogenides    
   Synonym:       potassium bisulfide, potassium mercaptan    

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Section 2: Composition and Information on Ingredients
   Ingredient       CAS Number       Percent       ACGIH (TWA)       OSHA (PEL)    
   Title compound       1310-61-8       100%       no data       no data    

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Section 3: Hazards Identification
   May form highly toxic and flammable hydrogen sulfide gas on exposure to acids or stomach fluids. Corrosive
   Emergency Overview:
   to skin, eyes and mucous membranes. Possible risk of irreversible effects.
   Primary Routes of Exposure:       Ingestion, inhalation, skin, eyes    
   Eye Contact:       Dust causes burns to the eyes.    
   Contact with skin can produce serious caustic burns with painful inflammation and possible destruction of
   Skin Contact:
   tissue.
   Inhalation of dust can lead to chemical burns to the respiratory tract. Hydrogen sulfide, if formed, is poisonous.
   Inhalation:
   Ingestion:       Gastric juices causes release of toxic hydrogen sulfide.    
   Hydrogen sulfide gas may cause painful conjunctivitis, headache, nausea, dizziness, pulmonary edema and
   Acute Health Affects:
   possible death. Corrosive to skin, eyes and respiratory tract. Possible risk of irreversible effects.
   Chronic Health Affects:       No information available on long-term chronic effects    
   NTP:       No    
   IARC:       No    
   OSHA:       No    

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SECTION 4: First Aid Measures
   Immediately flush the eyes with copious amounts of water for at least 10-15 minutes. A victim may need
   Eye Exposure:
   assistance in keeping their eye lids open. Get immediate medical attention.
   Wash the affected area with water. Remove contaminated clothes if necessary. Seek medical assistance if
   Skin Exposure:
   irritation persists.
   Remove the victim to fresh air. Closely monitor the victim for signs of respiratory problems, such as difficulty
   Inhalation:
   in breathing, coughing, wheezing, or pain. In such cases seek immediate medical assistance.
   Seek medical attention immediately. Keep the victim calm. Give the victim water (only if conscious). Induce
   Ingestion:
   vomiting only if directed by medical personnel.

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SECTION 5: Fire Fighting Measures
   Flash Point:       not applicable    
   Autoignition Temperature:       no data    
   Explosion Limits:       no data    
   Extinguishing Medium:       carbon dioxide or dry powder    
   If this product is involved in a fire, fire fighters should be equipped with a NIOSH approved positive pressure
   Special Fire Fighting Procedures:
   self-contained breathing apparatus and full protective clothing.
   Hazardous Combustion and       If involved in a fire, this material may emit irritating fumes of hydrogen sulfide and sulfur dioxide.    
   Decomposion Products:
   Dust may form explosive mixtures with air. Contact with acids gives off hydrogen sulfide; a toxic and
   Unusual Fire or Explosion Hazards:
   flammable gas.

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SECTION 6: Accidental Release Measures
   In the case of a spill, the fine powder should be covered with dry sodium carbonate or dolomite in order to
   Spill and Leak Procedures:
   reduce the formation of dust. Sweep up the mixture.

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SECTION 7: Handling and Storage
   Store in a tightly sealed container. Exposure to the atmosphere may lead to release of toxic hydrogen sulfide
   Handling and Storage:
   gas. Empty containers may retain product residues that evolve toxic gases.

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SECTION 8: Exposure Controls and Personal Protection
   Eye Protection:       Wear safety glasses and face shield or goggles when handling this chemical substance in the laboratory.    
   Skin Protection:       Wear appropriate chemical resistant rubber gloves and protective clothing.    
   Ventilation:       Handle the material in an efficient fume hood.    
   If ventilation is not available a respirator should be worn. The use of respirators requires a Respirator
   Respirator:
   Protection Program to be in compliance with 29 CFR 1910.134.
   Ventilation:       Handle the material in an efficient fume hood.    
   Additional Protection:       No additional protection required.    

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SECTION 9: Physical and Chemical Properties
   Color and Form:       white to off-white pwdr.    
   Molecular Weight:       72.18    
   Melting Point:       no data    
   Boiling Point:       no data    
   Vapor Pressure:       no data    
   Specific Gravity:       no data    
   Odor:       odor of rotten eggs    
   Solubility in Water:       very soluble    

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SECTION 10: Stability and Reactivity
   Stability:       slow decomposition in air, hygroscopic    
   Hazardous Polymerization:       no hazardous polymerization    
   contact with air, and mineral acids. Reaction with mineral acids can lead to formation of toxic hydrogen sulfide
   Conditions to Avoid:
   fumes.
   Incompatibility:       oxidizing agents, mineral acids, halogens and carbon    
   Decomposition Products:       hydrogen sulfide, sulfur dioxide, potassium sulfate, and potassium hydroxide    

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SECTION 11: Toxicological Information
   RTECS Data:       No information available in the RTECS files    
   Carcinogenic Effects:       no data    
   Mutagenic Effects:       no data    
   Tetratogenic Effects:       no data    

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SECTION 12: Ecological Information
   Ecological Information:       No information available    

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SECTION 13: Disposal Considerations
   Disposal:       Dispose of according to local, state and federal regulations    

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SECTION 14: Transportation
   Shipping Name (CFR):       Self-heating solid, Inorganic, N.O.S.    
   Hazard Class (CFR):       4.2    
   Additional Hazard Class (CFR):       NA    
   Packaging Group (CFR):       II    
   UN ID Number (CFR):       UN# 3190    
   Shipping Name (IATA):       Self-heating solid, Inorganic, N.O.S.    
   Hazard Class (IATA):       4.2    
   Additional Hazard Class (IATA):       NA    
   Packaging Group (IATA):       II    
   UN ID Number (IATA):       UN# 3190    

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SECTION 15: Regulatory Information
   TSCA:       Listed in the TSCA inventory    
   SARA (Title 313):       Title compound not listed    
   Second Ingredient:       none    

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SECTION 16 - ADDITIONAL INFORMATION
N/A