NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

m-Nitrotoluene

CAS
99-08-1

NO2C6H4CH3

RTECS
XT2975000
Synonyms & Trade Names

m-Methylnitrobenzene, 3-Methylnitrobenzene, meta-Nitrotoluene, 3-Nitrotoluene
DOT ID & Guide
1664 / 152

Exposure
Limits

NIOSH REL: TWA 2 ppm (11 mg/m3) [skin]
OSHA PEL: TWA 5 ppm (30 mg/m3) [skin]
IDLH
200 ppm See: IDLH INDEX
Conversion
1 ppm = 5.61 mg/m3
Physical Description
Yellow liquid with a weak, aromatic odor. [Note: A solid below 59°F.]
MW: 137.1
BP: 450°F
FRZ: 59°F
Sol: 0.05%
VP: 0.1 mmHg
IP: 9.48 eV

Sp.Gr: 1.16
Fl.P: 223°F
UEL: ?
LEL: 1.6%

Class IIIB Combustible Liquid: Fl.P. at or above 200F.
Incompatibilities & Reactivities

Strong oxidizers, sulfuric acid
Measurement Methods
NIOSH 2005
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
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 20 ppm:
(APF = 10) Any supplied-air respirator*
Up to 50 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
Up to 100 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 200 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 organic vapor canister having an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters./Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
Anoxia, cyanosis; headache, lassitude (weakness, exhaustion), dizziness; ataxia; dyspnea (breathing difficulty); tachycardia; nausea, vomiting
Target Organs
Blood, central nervous system, cardiovascular system, skin, gastrointestinal tract
See also: INTRODUCTION   See ICSC CARD: 1411   See MEDICAL TESTS: 0168