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| Hydrogen selenide | CAS 7783-07-5 | ||
| H2Se | RTECS MX1050000 | ||
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Synonyms & Trade Names Selenium dihydride, Selenium hydride |
DOT ID & Guide 2202 117 (anhydrous) |
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Exposure Limits |
NIOSH REL: TWA 0.05 ppm (0.2 mg/m3) | ||
| OSHA PEL: TWA 0.05 ppm (0.2 mg/m3) | |||
| IDLH 1 ppm | Conversion 1 ppm = 3.31 mg/m3 | ||
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Physical Description Colorless gas with an odor resembling decayed horse radish. [Note: Shipped as a liquefied compressed gas.] |
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MW: 81.0 |
BP: -42°F |
FRZ: -87°F |
Sol(73°F): 0.9% |
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VP(70°F): 9.5 atm |
IP: 9.88 eV |
RGasD: 2.80 |
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Fl.P: NA (Gas) |
UEL: ? |
LEL: ? |
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| Flammable Gas | |||
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Incompatibilities & Reactivities Strong oxidizers, acids, water, halogenated hydrocarbons |
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Measurement Methods None available |
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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 |
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Respirator Recommendations
NIOSH/OSHA Up to 0.5 ppm: (APF = 10) Any supplied-air respirator Up to 1 ppm: (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 Emergency or planned entry into unknown concentrations or IDLH conditions: (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 |
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| Exposure Routes inhalation, skin and/or eye contact | |
| Symptoms Irritation eyes, nose, throat; nausea, vomiting, diarrhea; metallic taste, garlic breath; dizziness, lassitude (weakness, exhaustion); liquid: frostbite; in animals: pneumonitis; liver damage | |
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Target Organs
Eyes, respiratory system, liver |
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| See also: INTRODUCTION |