Synonyms & Trade NamesBenzidine-based dyes, 4,4'-Bianiline, 1,1'-Biphenyl-4,4'-diamine, 4,4'-Biphenyldiamine, 4,4'-Diaminobiphenyl, p-Diaminodiphenyl [Note: Benzidine has been used as a basis for many dyes.]
See: IDLH INDEX
NIOSH RELCa See Appendix A See Appendix C
OSHA PEL[1910.1010] See Appendix B See Appendix C
Physical DescriptionGrayish-yellow, reddish-gray, or white crystalline powder. [Note: Darkens on exposure to air and light.]
Upper Exposive Limit?
Lower Explosive Limit?
Incompatibilities & ReactivitiesRed fuming nitric acid
Exposure Routesinhalation, skin absorption, ingestion, skin and/or eye contact
Symptomshematuria (blood in the urine); secondary anemia from hemolysis; acute cystitis; acute liver disorders; dermatitis; painful, irreg urination; [potential occupational carcinogen]
Target OrgansBladder, skin, kidneys, liver, blood
Cancer Site[liver, kidney & bladder cancer]
Personal Protection/Sanitation(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated/Daily
Remove:When wet or contaminated
Provide:Eyewash, Quick drench
First Aid(See procedures)
Skin:Soap wash immediately
Swallow:Medical attention immediately
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
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division