Label abbreviations descriptions

HYDROGEN SELENIDE†

Chemical Identification
CAS # 7783-07-5
Formula

H₂Se
Synonyms

selenium dihydride; selenium hydride

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
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.

Bulk/Wipe Method
Wipe Sampler/Sampling media
 

 
Bulk Method
 

 

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
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

Last Updated Date : 12/31/2020