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EXPOSURE CONTROLS/PERSONAL PROTECTION(contin~ed) <br />Exposure Guideline Comments <br />• The "Skin" notation in the Exposure Limits Section indicates <br />that liquid or vapor may penetrate the skin (especially if <br />the skin is broken). Control of vapor, dust, and mist <br />inhalation alone may not be suffiicient to prevent an <br />excessive dose. <br />i <br />PHY5IC~1I. AND CHEMICAL PROPERTIES <br />Physical Data <br />Boiling Point: <br />Vapor Pressure: <br />Vapor Density: <br />Melting Point: <br />Solubility in Water: <br />pH: <br />Form: <br />Color: <br />Specific Gravity: <br />Bulk Density (Packed): <br />1496 C (2725 F) @ 760 mm Hg <br />Negligible <br />Not Volatile <br />564 C (1047 F) <br />37 WT% @ 20 C (68 F) <br />11-12* <br />Solid, Granular, Briquettes <br />White <br />1 .6 <br />50-55 lb/cu fit <br />Solid cyanide has no odor, but it can have a slight ammonia <br />and/or hydrogen cyanide odor if damp. <br />*The pH listed above is typical for 5-25% solutions with no <br />pH adjustment. <br />• STABILITY AND REACTIVITY <br />Chemical Stability <br />Very stable when dry. <br />Incompatibility with Other Materials <br />Large amounts of poisonous, flammable hydrogen cyanide (HCN) gas <br />will be evolved from contact with acids. Reacts violently with <br />strong oxidizing agents when heated. Water or weak alkaline <br />solutions can produce dangerous amounts of hydrogen cyanide in <br />confined areas. <br />Decomposition <br />Moisture will cause slow decomposition, releasing poisonous <br />hydrogen cyanide and ammonia gases. <br />Polymerization <br />Polymerization will .not occur. <br />(Continued) <br />• <br />1252CR Page 12 <br />I <br />