DIBORANE†

Chemical Identification
CAS # 19287-45-7
Formula

B₂H₆

Synonyms

boroethane; boron hydride; diboron hexahydride

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
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) 233-5100.

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
Sampler/Sampling media
Bulk Method
Bulk Method
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
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

Last Updated Date : 01/22/2024