NITROMETHANE†

Chemical Identification
CAS # 75-52-5
Formula
 

CH₃NO₂

Synonyms
 

nitrocarbol

Physical Properties
Physical description Colorless, oily liquid with a disagreeable odor.
Boiling point 214°F Molecular weight 61.04
Freezing point/melting point -20°F Vapor pressure 28 mmHg
Flash point 95°F Vapor density 2.11
Specific gravity 1.139 Ionization potential 11.08 eV
Lower explosive limit (LEL) 7.3% Upper explosive limit (UEL)
NFPA health rating 2 NFPA fire rating 3
NFPA reactivity rating 4 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 1920
Sampling group
Sampler/Sampling media Chromosorb® 106 (600/300 mg) [SKC 226-111A]
Sampling time*
 

 

Sampling volume (TWA)*
 

1.2-3 L

Sampling flow rate (TWA)*

0.05 L/min

Sampling volume (STEL/Peak/C)*
 

 

Sampling flow rate (STEL/Peak/C)*
 

 

Analytical method instruments GC
Method reference NIOSH 2527 (fully validated)
Notes
 

Separate front and back sorbent sections

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
Model/Type
Sampling information
(see manufacturer instructions)
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
 

100 ppm (250 mg/m³)

REL-TWA
 

 

TLV-TWA
 

20 ppm [1997]

PEL-TWA
 

2 ppm (5 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:
 

See Appendix D - Substances with No Established RELs.

Notes:
 

 

Notes:
 

 

Health factors:  See NIH-NLM PubChem. IDLH
 

750 ppm

Carcinogenic classifications: TLV-A3, IARC-2B, NTP-R Notes:
 

 

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 

 

Last Updated Date : 01/13/2023