DIBORANE†

Chemical Identification
Chemical Identification
CAS # 19287-45-7
Formula

B₂H₆

Synonyms

boroethane; boron hydride; diboron hexahydride

Physical Properties
Physical Properties
Physical description Colorless gas with a repulsive, sweet odor.
Boiling point -135°F Molecular weight 27.7
Freezing point/melting point -265°F Vapor pressure 224 mmHg at -169°F
Flash point -130°F Vapor density 0.97
Specific gravity 0.447 at -169.6°F Ionization potential 11.38 eV
Lower explosive limit (LEL) 0.8% Upper explosive limit (UEL) 88%
NFPA health rating 4 NFPA fire rating 4
NFPA reactivity rating 3 NFPA special instruction W: Reacts violently or explosively with water
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0862
Sampling group
Sampler/Sampling media PTFE filter & oxidizer-impregnated charcoal (100/50 mg) [no longer available]
Sampling time*
Sampling volume (TWA)*

60-260 L

Sampling flow rate (TWA)*

0.5-1 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments ICP
Method reference NIOSH 6006 (fully validated)
Notes

This media is no longer available. OSHA staff please contact the SLTC prior to sampling at (801) 233-4900.

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 Infrared spectrophotometer
Model/Type Dräger 6718101 Miran 1A & 1B
Sampling information
(see manufacturer instructions)
0.05-3 ppm range 0.6 ppm@3.8 µm
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

0.1 ppm (0.1 mg/m³)

REL-TWA

0.1 ppm (0.1 mg/m³)

TLV-TWA

0.1 ppm [1990]

PEL-TWA

0.1 ppm

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

15 ppm

Carcinogenic classifications: Not listed Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

--/1 ppm/3 ppm

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Diborane

NIOSH: Pocket Guide to Chemical Hazards - Diborane

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Diborane. See annual publication for most recent information.
  • Occupational Health Guidelines for Chemical Hazards. US Department of Health and Human Services (DHHS), National Institute for Occupational Safety and Health (NIOSH) Publication No. 81-123, (1981, January). Provides a table of contents of guidelines for many hazardous chemicals. The files provide technical chemical information, including chemical and physical properties, health effects, exposure limits, and recommendations for medical monitoring, personal protective equipment (PPE), and control procedures.

Last Updated Date : 12/22/2020