NIOSH Pocket Guide to Chemical Hazards

Nitrobenzene CAS 98-95-3
C6H5NO2 RTECS DA6475000
Synonyms & Trade Names
Essence of mirbane, Nitrobenzol, Oil of mirbane
DOT ID & Guide
1662 152
Exposure
Limits
NIOSH REL: TWA 1 ppm (5 mg/m3) [skin]
OSHA PEL: TWA 1 ppm (5 mg/m3) [skin]
IDLH 200 ppm Conversion 1 ppm = 5.04 mg/m3
Physical Description
Yellow, oily liquid with a pungent odor like paste shoe polish. [Note: A solid below 42°F.]
MW: 123.1
BP: 411°F
FRZ: 42°F
Sol: 0.2%
VP(77°F): 0.3 mmHg
IP: 9.92 eV

Sp.Gr: 1.20
Fl.P: 190°F
UEL: ?
LEL(200°F): 1.8%

Class IIIA Combustible Liquid: Fl.P. at or above 140F and below 200F.
Incompatibilities & Reactivities
Concentrated nitric acid, nitrogen tetroxide, caustics, phosphorus pentachloride, chemically-active metals such as tin or zinc
Measurement Methods
NIOSH 2005, 2017
Personal Protection & Sanitation
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: No recommendation
Remove: When wet or contaminated
Change: Daily
Provide: Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA
Up to 10 ppm: (APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)*/(APF = 10) Any supplied-air respirator*
Up to 25 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*/(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)*
Up to 50 ppm: (APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)/(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s)*/(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/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin; anoxia; dermatitis; anemia; methemoglobinemia; in animals: liver, kidney damage; testicular effects
Target Organs Eyes, skin, blood, liver, kidneys, cardiovascular system, reproductive system
See also: INTRODUCTION