Monomethyl aniline
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Synonyms & Trade Names
MA, (Methylamino)benzene, N-Methyl aniline, Methylphenylamine, N-PhenylmethylamineExposure Limits
NIOSH REL
TWA 0.5 ppm (2 mg/m3) [skin]OSHA PEL
TWA 2 ppm (9 mg/m3) [skin] See Appendix GPhysical Description
Yellow to light-brown liquid with a weak, ammonia-like odor.Molecular Weight
107.2Boiling Point
384°FFreezing Point
-71°FSolubility
InsolubleVapor Pressure
0.3 mmHgIonization Potential
7.32 eVSpecific Gravity
0.99Flash Point
175°FUpper Exposive Limit
?Lower Explosive Limit
?Incompatibilities & Reactivities
Strong acids, strong oxidizersExposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contactSymptoms
lassitude (weakness, exhaustion), dizziness, headache; dyspnea (breathing difficulty), cyanosis; methemoglobinemia; pulmonary edema; liver, kidney damageTarget Organs
respiratory system, liver, kidneys, blood, central nervous systemPersonal Protection/Sanitation
(See protection codes)Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:No recommendation
First Aid
(See procedures)Eye:Irrigate immediately
Skin:Soap wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations
NIOSH
Up to 5 ppm:
(APF = 10) Any supplied-air respirator
Up to 12.5 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
Up to 25 ppm:
(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Up to 100 ppm:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern
Any appropriate escape-type, self-contained breathing apparatus
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division