Hydrogen selenide |
Synonyms & Trade Names Selenium dihydride, Selenium hydride |
CAS No. 7783-07-5 |
RTECS No. MX1050000 |
DOT ID & Guide 2202 117 (anhydrous) |
FormulaH2Se |
Conversion 1 ppm = 3.31 mg/m3 |
IDLH 1 ppm
See: 7783075 |
Exposure Limits NIOSH REL: TWA 0.05 ppm (0.2 mg/m3)
OSHA PEL: TWA 0.05 ppm (0.2 mg/m3) |
Measurement Methods
None available
See: NMAM or OSHA Methods |
Physical Description Colorless gas with an odor resembling decayed horseradish. [Note: Shipped as a liquefied compressed gas.] |
MW: 81.0 |
BP: -42°F |
FRZ: -87°F |
Sol(73°F): 0.9% |
VP(70°F): 9.5 atm |
IP: 9.88 eV |
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Fl.P: NA (Gas) |
UEL: ? |
LEL: ? |
RGasD: 2.80 |
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| Flammable Gas |
Incompatibilities & Reactivities Strong oxidizers, acids, water, halogenated hydrocarbons |
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 |
Target Organs Eyes, respiratory system, liver |
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Personal Protection/Sanitation (See protection codes)
Skin: Frostbite
Eyes: Frostbite
Wash skin: No recommendation
Remove: When wet (flammable)
Change: No recommendation
Provide: Frostbite wash |
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
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0284
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