NIOSH Pocket Guide to Chemical Hazards


CAS 92-93-3


RTECS DV5600000
Synonyms & Trade Names
p-Nitrobipheny, p-Nitrodiphenyl, 4-Nitrodiphenyl, p-Phenylnitrobenzene, 4-Phenylnitrobenzene, PNB
DOT ID & Guide


NIOSH REL: Ca See Appendix A
OSHA PEL: [1910.1003] See Appendix B
IDLH Ca [N.D.] See: IDLH INDEX Conversion
Physical Description
White to yellow, needle-like, crystalline solid with a sweetish odor.
MW: 199.2
BP: 644°F
MLT: 237°F
Sol: Insoluble
VP: ?
IP: ?

Sp.Gr: ?
Fl.P: 290°F
UEL: ?
LEL: ?

Combustible Solid
Incompatibilities & Reactivities
Strong reducers
Measurement Methods
NIOSH P&CAM273 (II-4); OSHA PV2082
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations (See Appendix E) NIOSH
At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(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
(APF = 50) Any air-purifying, full-facepiece respirator with 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
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Headache, drowsiness, dizziness; dyspnea (breathing difficulty); ataxia, lassitude (weakness, exhaustion); methemoglobinemia; urinary burning; acute hemorrhagic cystitis; [potential occupational carcinogen]
Target Organs Bladder, blood

Cancer Site [in animals: bladder tumors]
See also: INTRODUCTION   See ICSC CARD: 1395   See MEDICAL TESTS: 0162