Hydrogen selenide
|
CAS
7783-07-5
|
H2Se
|
RTECS
MX1050000
|
Synonyms & Trade Names
Selenium dihydride, Selenium hydride
|
DOT ID & Guide
2202 / 117 (anhydrous)
|
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
See: 7783075
|
Conversion
1 ppm = 3.31 mg/m3
|
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
|
RGasD: 2.80
|
|
Fl.P: NA (Gas)
|
UEL: ?
|
LEL: ?
|
|
|
Flammable Gas
|
Incompatibilities & Reactivities
Strong oxidizers, acids, water, halogenated hydrocarbons
|
Measurement Methods
None available
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
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
|
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
|
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
|
|
See also: INTRODUCTION
See ICSC CARD: 0284 |
