PENTABORANE†

Chemical Identification
Chemical Identification
CAS # 19624-22-7
Formula

B₅H₉

Synonyms

pentaboron nonahydride

Physical Properties
Physical Properties
Physical description Colorless liquid with a pungent odor like sour milk.
Boiling point 140°F Molecular weight 63.17
Freezing point/melting point -52°F Vapor pressure 171 mmHg
Flash point 86°F Vapor density
Specific gravity 0.62 Ionization potential 9.90 eV
Lower explosive limit (LEL) 0.42% Upper explosive limit (UEL) 98%
NFPA health rating 4 NFPA fire rating 4
NFPA reactivity rating 2 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.)
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
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
Model/Type
Sampling information
(see manufacturer instructions)
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

0.005 ppm (0.01 mg/m³)

REL-TWA

0.005 ppm (0.01 mg/m³)

TLV-TWA

0.005 ppm [1970]

PEL-TWA

0.005 ppm (0.01 mg/m³)

PEL-STEL REL-STEL

0.015 ppm (0.03 mg/m³)

TLV-STEL

0.015 ppm [1970]

PEL-STEL

0.015 ppm (0.03 mg/m³)

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:
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Pentaborane

NIOSH: Pocket Guide to Chemical Hazards - Pentaborane

Literature References

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

Last Updated Date : 01/08/2021