NIOSH Pocket Guide to Chemical Hazards

o-Nitrotoluene CAS 88-72-2
NO2C6H4CH3 RTECS XT3150000
Synonyms & Trade Names
o-Methylnitrobenzene, 2-Methylnitrobenzene, ortho-Nitrotoluene, 2-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 Conversion 1 ppm = 5.61 mg/m3
Physical Description
Yellow liquid with a weak, aromatic odor. [Note: A solid below 25°F.]
MW: 137.1
BP: 432°F
FRZ: 25°F
Sol: 0.07%
VP: 0.1 mmHg
IP: 9.43 eV

Sp.Gr: 1.16
Fl.P: 223°F
UEL: ?
LEL: 2.2%

Class IIIB Combustible Liquid: Fl.P. at or above 200�F.
Incompatibilities & Reactivities
Strong oxidizers, sulfuric acid
Measurement Methods
NIOSH 2005
Personal Protection & Sanitation
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 a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
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