UN 1613, hydrogen cyanide (AC), not more than 20% solution, is non-combustible.Use of water spray when fighting fires may be inefficient. Caution: UN 1614 and UN 3294 have very low flash points.UN 1614 and UN 3294 will be easily ignited by heat, sparks, or flames.UN 1614, hydrogen cyanide (AC), stabilized and UN 3294, hydrogen cyanide (AC) solution in alcohol, are highly flammable.UN 1051 may be ignited by heat, sparks, or flames.UN 1051, hydrogen cyanide (AC), >20% solution or anhydrous, is extremely flammable.Fire will produce irritating, corrosive, and/or toxic gases.Escape mask, face shield, coveralls, long underwear, a hard hat worn under the chemical-resistant suit, and chemical-resistant disposable boot-covers worn over the chemical-resistant suit are optional items.A NIOSH-certified CBRN PAPR with a loose-fitting face-piece, hood, or helmet and a filter or a combination organic vapor, acid gas, and particulate cartridge/filter combination or a continuous flow respirator for air levels greater than AEGL-1.A NIOSH-certified CBRN tight-fitting APR with a canister-type gas mask or CBRN PAPR for air levels greater than AEGL-2.This level is appropriate when decontaminating patient/victims. Select when the contaminant and concentration of the contaminant are known and the respiratory protection criteria factors for using Air Purifying Respirators (APR) or Powered Air Purifying Respirators (PAPR) are met. ![]()
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