HYDROGEN SELENIDE†

Chemical Identification
Chemical Identification
CAS # 7783-07-5
Formula

H₂Se

Synonyms

selenium dihydride; selenium hydride

Physical Properties
Physical Properties
Physical description Colorless gas with an odor resembling decayed horseradish.
Boiling point -42°F Molecular weight 80.98
Freezing point/melting point -87°F Vapor pressure 9.5 atm at 70°F
Flash point Vapor density 2.12 at -43.6°F
Specific gravity Ionization potential 9.88 eV
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 1475
Sampling group
Sampler/Sampling media
Sampling time*
Sampling volume (TWA)*
Sampling flow rate (TWA)*
Sampling volume (STEL/Peak/C)*
 

 

Sampling flow rate (STEL/Peak/C)*
Analytical method instruments
Method reference
Notes
 

Please see SELENIUM & COMPOUNDS.

Special requirements
 

 

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
 

 

Bulk Method
Bulk Method
 

 

On-Site Screening Techniques
On-Site Screening Techniques
Device Detector tube
Model/Type Matheson-Kitagawa 8014-167S
Sampling information
(see manufacturer instructions)
follow mfr instructions, 1-600 ppm range
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA
 

0.05 ppm (0.2 mg/m³)

REL-TWA
 

0.05 ppm (0.2 mg/m³)

TLV-TWA
 

0.05 ppm [1990]

PEL-TWA
 

0.05 ppm (0.2 mg/m³)

PEL-STEL
 

 

REL-STEL
 

 

TLV-STEL
 

 

PEL-STEL
 

 

PEL-C
 

 

REL-C
 

 

TLV-C
 

 

PEL-C
 

 

Skin notation
 

N

Skin notation
 

N

Skin notation
 

N

Skin notation
 

N

Notes:
 

See 29 CFR 1910.1000 Table Z-1.

Notes:
 

 

Notes:
 

 

Notes:
 

 

Health factors:  See NIH-NLM PubChem. IDLH
 

1 ppm

Carcinogenic classifications: Not listed Notes:
 

 

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 

--/0.2 ppm/2 ppm

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Hydrogen selenide, anhydrous

NIOSH: Pocket Guide to Chemical Hazards - Hydrogen selenide

Literature References

 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Hydrogen selenide, as Se. See annual publication for most recent information.

Last Updated Date : 12/31/2020