# NIOSH Pocket Guide to Chemical Hazards
4-Aminodiphenyl | CAS 92-67-1
C6H5C6H4NH2 | RTECS DU8925000
Synonyms & Trade Names 4-Aminobiphenyl, p-Aminobiphenyl, p-Aminodiphenyl, 4-Phenylaniline | DOT ID & Guide
Exposure Limits | NIOSH REL: Ca See Appendix A
OSHA PEL: [1910.1011] See Appendix B
IDLH Ca [N.D.] | Conversion
Physical Description Colorless crystals with a floral odor. [Note: Turns purple on contact with air.]
MW: 169.2 | BP: 576°F | MLT: 127°F | Sol: Slight
VP(227°F): 1 mmHg | IP: ? |  | Sp.Gr: 1.16
Fl.P: ? | UEL: ? | LEL: ? |
Combustible Solid, but must be preheated before ignition possible.
Incompatibilities & Reactivities Oxidized by air
Measurement Methods NIOSH P&CAM269 (II-4); OSHA 93
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, dizziness; drowsiness, dyspnea (breathing difficulty); ataxia, lassitude (weakness, exhaustion); methemoglobinemia; urinary burning; acute hemorrhagic cystitis; [potential occupational carcinogen]
Target Organs Bladder, skin Cancer Site [bladder cancer]
See also: INTRODUCTION