Label abbreviations descriptions

MONOMETHYL ANILINE (N-METHYLANILINE)†

Chemical Identification
CAS # 100-61-8
Formula

C₇H₉N
Synonyms

MA; (methylamino)benzene; N-methyl aniline; methylphenylamine; N-phenylmethylamine

Physical Properties
Physical description Yellow to light-brown liquid with a weak, ammonia-like odor.
Boiling point 385.3°F Molecular weight 107.16
Freezing point/melting point -71°F Vapor pressure 1 mmHg at 106°F
Flash point 175°F Vapor density 3.9
Specific gravity 0.989 Ionization potential 7.32 eV
Lower explosive limit (LEL) Upper explosive limit (UEL)
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
Analyte code (IMIS no.) 1972
Sampling group
Sampler/Sampling media Midget fritted glass bubbler (MFGB) containing 10 mL Sulfuric Acid (0.05 M) [Infrequently Requested Method - OSHA staff please contact SLTC before sampling 801-233-5100]
Sampling time*
Sampling volume (TWA)*

11-100 L
Sampling flow rate (TWA)*

0.2-1 L/min
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-FID
Method reference NIOSH 3511 (partially validated)
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.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device Detector tube Infrared spectrophotometer
Model/Type Gastec 181 Miran 1A & 1B
Sampling information
(see manufacturer instructions) 		2.5-45 ppm 1.9 ppm@9.4 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

2 ppm (9 mg/m³)

 REL-TWA
 

0.5 ppm (2 mg/m³)

 TLV-TWA
 

0.5 ppm [1992]

 PEL-TWA
 

0.5 ppm (2 mg/m³)
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

Y

 Skin notation
 

Y

 Skin notation
 

Y

 Skin notation
 

Y
Notes:
 

See 29 CFR 1910.1000 Table Z-1.

 Notes: Notes:
 

BEI®

 Notes:
Health factors:  See NIH-NLM PubChem. IDLH
 

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

Additional Resources and Literature References

Last Updated Date : 01/22/2024