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                                          HYDROCYANIC ACID
      ~POISON            Square background applicable Poison A or B


         MG~A2%/
         POTENTIAL HAZARDS
         GENERAL HAZARDS
         Threshold Odor Concentration: 0.2-5 ppm (if evident)
         Unusual Hazards: Extremely toxic, flammable substance that may be hazardous over considerable downwind
           distances. Storage of more than 90 days, excessive heat, or chemical contamination may result in explosive
           polymerization.
         Short Tenn Exposure Limits(STEL): Unavailable
         Time Weighted Average(TLV-TWA): (Skin) 10 ppm absolute ceiling limit.(ACGIH)
         Conditions to Avoid: Heat, fire, or sparks; contact with incompatible materials; runoff to sewers or water bodies;
           inhalation, ingestion, or direct physical contact.
         HEALTH HAZARDS
         Public Health Hazards: Vapors may be toxic over considerable downwind distances. All exposures should be strictly
           avoided.
         Hazards of Skin or Eye Contact: Liquid hydrocyanic acid and its concentrated vapors have little or no irritant effect
           on the skin but may be rapidly absorbed in toxic amounts. Contact with the eyes may cause local irritation and
           may also result in hazardous absorption.
         Hazards of Inhalation: Relatively low concentrations in air may cause weakness, headache, confusion, occasional
           nausea and vomiting, difficult breathing, cyanosis, and convulsions. Higher levels may cause rapid unconsciousness
           and death. Opinions vary, but many state that 270 ppm is rapidly fatal while 110 ppm is fatal in one hour; 45-54
           ppm may cause symptoms in 30-60 minutes.
         Hazards of Ingestion: The ingestion of as little as 50-100 mg (0.0035 ounce or less) may be fatal.
         FIRE HF7ZammARab%S4mit: 5.6-6%

         Upper Flammable Innut: 40-41%
         Behavior in Ffre: Flammable liquefied gas or liquid. May generate large quantities of flammable and toxic vapors
 *         upon release. Vapors may travel considerable distance to a source of ignition and flash back. Containers may
           rupture violently in fire. Exposure of containers to fire may result in explosive polymerization.
         Hazardous Combustion Products: Toxic, may include unburned cyanides and nitrogen oxides.
         EXPLOSION HAZARDS
         Lower Explosive Limit: Unavailable
         Upper Explosive Limit: Unavailable
         Explosiveness: Explosion ma? result if vapors are ignited in a confined area. Containers may rupture violently in
           fire. Loss of stabilizer or excessive heat may cause polymerization resulting in violent container rupture.
           Polymerization may also occur in the presence of bases or alkalis.

         PROTECTIVE CLOTHING AND EQUIPMENT
         Protective Clothing Required: Equipment should prevent any possibility of skin or eye contact with the spilled
           product. This may include rubber boots, gloves, face shields, splash-proof safety goggles, and other impervious and
           resistant clothing. Fully encapsulating suits with self-contained breathing apparatus (SCBA) may be necessary to
           prevent contact with high vapor or fume concentrations in air. Compatible materials may include butyl rubber,
           neoprene, polyvinyl chloride, and Viton.
         Respiratory Protection: For unknown concentrations, fire fighting, or high concentrations (above 10 ppm), a self-
           contained breathing apparatus (SC BA) with full facepiece (or the equivalent).


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