# NIOSH Pocket Guide to Chemical Hazards
Arsine | CAS 7784-42-1
AsH3 | RTECS CG6475000
Synonyms & Trade Names Arsenic hydride, Arsenic trihydride, Arseniuretted hydrogen, Arsenous hydride, Hydrogen arsenide | DOT ID & Guide 2188 119
Exposure Limits | NIOSH REL: Ca C 0.002 mg/m3 [15-minute] See Appendix A
OSHA PEL: TWA 0.05 ppm (0.2 mg/m3)
IDLH Ca [3 ppm] | Conversion 1 ppm = 3.19 mg/m3
Physical Description Colorless gas with a mild, garlic-like odor. [Note: Shipped as a liquefied compressed gas.]
MW: 78.0 | BP: -81°F | FRZ: -179°F | Sol: 20%
VP(70°F): 14.9 atm | IP: 9.89 eV | RGasD: 2.69 |
Fl.P: NA (Gas) | UEL: 78% | LEL: 5.1% |
Flammable Gas
Incompatibilities & Reactivities Strong oxidizers, chlorine, nitric acid [Note: Decomposes above 446°F. There is a high potential for the generation of arsine gas when inorganic arsenic is exposed to nascent (freshly formed) hydrogen.]
Measurement Methods NIOSH 6001; OSHA ID105
Personal Protection & Sanitation Skin: Frostbite Eyes: Frostbite Wash skin: No recommendation Remove: When wet (flammable) Change: No recommendation Provide: Frostbite | First Aid (See procedures) Eye: Frostbite Skin: Frostbite Breathing: Respiratory support
Respirator Recommendations NIOSH At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration: (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 Escape: (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
Exposure Routes inhalation, skin and/or eye contact (liquid)
Symptoms Headache, malaise (vague feeling of discomfort), lassitude (weakness, exhaustion), dizziness; dyspnea (breathing difficulty); abdominal, back pain; nausea, vomiting; bronze skin; hematuria (blood in the urine); jaundice; peripheral neuropathy; liquid: frostbite; [potential occupational carcinogen]
Target Organs Blood, kidneys, liver Cancer Site [lung & lymphatic cancer]
See also: INTRODUCTION