# NIOSH Pocket Guide to Chemical Hazards
4-Nitrobiphenyl | CAS 92-93-3
C6H5C6H4NO2 | RTECS DV5600000
Synonyms & Trade Names p-Nitrobipheny, p-Nitrodiphenyl, 4-Nitrodiphenyl, p-Phenylnitrobenzene, 4-Phenylnitrobenzene, PNB | DOT ID & Guide
Exposure Limits | NIOSH REL: Ca See Appendix A
OSHA PEL: [1910.1003] See Appendix B
IDLH Ca [N.D.] | 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)
Personal Protection & Sanitation 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
Respirator Recommendations 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 Escape: (APF = 50) Any air-purifying, full-facepiece respirator with 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 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