ISOBUTYL NITRITE

Chemical Identification
Chemical Identification
CAS # 542-56-3
Formula

C₄H₉NO₂

Synonyms

nitrous acid isobutyl ester; nitrous acid, 2-methylpropyl ester; Blackjack

Physical Properties
Physical Properties
Physical description Clear colorless to pale yellow liquid.
Boiling point 154.4°F Molecular weight 103.12
Freezing point/melting point Vapor pressure 10 mmHg
Flash point -10°F Vapor density >1
Specific gravity 0.87 at 72°F Ionization potential
Lower explosive limit (LEL) 1.2% at 70°F Upper explosive limit (UEL) 26.9% at 70°F
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.)
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 REL-TWA TLV-TWA PEL-TWA
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C

1 ppm [2000]

PEL-C
Skin notation

NA

Skin notation

NA

Skin notation

N

Skin notation

NA

Notes:

Not established

Notes:

Not established

Notes:

BEI®

Notes:

Not established

Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: TLV-A3 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 - Isobutyl nitrite

NIOSH: Pocket Guide to Chemical Hazards - Not Listed

Literature References

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

Last Updated Date : 12/31/2020