Hydrogen cyanide

CAS RN: 74-90-8

Protective Equip. / Clothing

Wear special protective clothing and positive pressure self-contained breathing apparatus. Teflon barrier recommended.
SKIN: Butyl rubber gloves. Teflon, Responder, or Tychem Protective clothing. EYES: Safety goggles, face shield, or eye protection in combination with breathing protection.
Wear appropriate personal protective clothing to prevent skin contact.
Wear appropriate eye protection to prevent eye contact.
Eyewash fountains should be provided in areas where there is any possibility that workers could be exposed to the substance; this is irrespective of the recommendation involving the wearing of eye protection.
Facilities for quickly drenching the body should be provided within the immediate work area for emergency use where there is a possibility of exposure. [Note: It is intended that these facilities provide a sufficient quantity or flow of water to quickly remove the substance from any body areas likely to be exposed. The actual determination of what constitutes an adequate quick drench facility depends on the specific circumstances. In certain instances, a deluge shower should be readily available, whereas in others, the availability of water from a sink or hose could be considered adequate.]
Ventilation, local exhaust, or breathing protection. Gas mask with HC (Hydrogen Cyanide) canister (escape). Pressure demand, self-contained breathing apparatus (SCBA) (SCBA CBRN, if available) is recommended in response to non-routine emergency situations. CBRN, Full Facepiece APR (when available) is recommended in non-routine, emergency situation environments less than IDLH but above REL or PEL levels.
Respirator Recommendations: Up to 47 ppm:
Assigned Protection Factor (APF) Respirator Recommendations
APF = 10 Any supplied-air respirator.
Respirator Recommendations: Up to 50 ppm:
Assigned Protection Factor (APF) Respirator Recommendations
APF = 25 Any supplied-air respirator operated in a continuous-flow mode.
APF = 50 Any self-contained breathing apparatus with a full facepiece.
APF = 50 Any supplied-air respirator with a full facepiece.
Respirator Recommendations: Emergency or planned entry into unknown concentrations or IDLH conditions:
Assigned Protection Factor (APF) Respirator Recommendations
APF = 10,000 Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode.
APF = 10,000 Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus.
Respirator Recommendations: Escape:
Assigned Protection Factor (APF) Respirator Recommendations
APF = 50 Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern./Any appropriate escape-type, self-contained breathing apparatus.
Personnel protection: Wear positive pressure self-contained breathing apparatus. Wear appropriate chemical protective clothing. /Hydrogen cyanide, aqueous solution; Hydrogen cyanide, solution in alcohol; Hydrogen cyanide, stabilized (with less than 3% water); Hydrogen cyanide, stabilized (with less than 3% water absorbed in a porous material)/
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