Benzidine |
Synonyms & Trade Names Benzidine-based dyes; 4,4'-Bianiline; 4,4'-Biphenyldiamine; 1,1'-Biphenyl-4,4'-diamine; 4,4'-Diaminobiphenyl; p-Diaminodiphenyl [Note: Benzidine has been used as a basis for many dyes.] |
CAS No. 92-87-5 |
RTECS No. DC9625000 |
DOT ID & Guide 1885 153 |
FormulaNH2C6H4C6H4NH2 |
Conversion |
IDLH Ca [N.D.]
See: IDLH INDEX |
Exposure Limits NIOSH REL: Ca See Appendix A See Appendix C
OSHA PEL: [1910.1010] See Appendix B See Appendix C |
Measurement Methods
NIOSH 5509;
OSHA 65
See: NMAM or OSHA Methods |
Physical Description Grayish-yellow, reddish-gray, or white crystalline powder. [Note: Darkens on exposure to air and light.] |
MW: 184.3 |
BP: 752°F |
MLT: 239°F |
Sol(54°F): 0.04% |
VP: Low |
IP: ? |
Sp.Gr: 1.25 |
Fl.P: ? |
UEL: ? |
LEL: ? |
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| Combustible Solid, but difficult to burn. |
Incompatibilities & Reactivities Red fuming nitric acid |
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact |
Symptoms hematuria (blood in the urine); secondary anemia from hemolysis; acute cystitis; acute liver disorders; dermatitis; painful, irreg urination; [potential occupational carcinogen] |
Target Organs Bladder, 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
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 (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 Escape:
(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
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0224 See MEDICAL TESTS: 0023 |
