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| Benzidine | CAS 92-87-5 | ||
| NH2C6H4C6H4NH2 | RTECS DC9625000 | ||
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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.] |
DOT ID & Guide 1885 153 |
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Exposure Limits |
NIOSH REL: Ca See Appendix A See Appendix C | ||
| OSHA PEL: [1910.1010] See Appendix B See Appendix C | |||
| IDLH Ca [N.D.] | Conversion | ||
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Physical Description Grayish-yellow, reddish-gray, or white crystalline powder. [Note: Darkens on exposure to air and light.] |
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MW: 184.3 |
BP: 752°F |
MLT: 239°F |
Sol(54°F): 0.04% |
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VP: Low |
IP: ? |
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Sp.Gr: 1.25 |
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Fl.P: ? |
UEL: ? |
LEL: ? |
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| Combustible Solid, but difficult to burn. | |||
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Incompatibilities & Reactivities Red fuming nitric acid |
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Measurement Methods NIOSH 5509; OSHA 65 |
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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 |
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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 |
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| 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, irregular urination; [potential occupational carcinogen] | |
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Target Organs
Bladder, skin, kidneys, liver, blood Cancer Site [liver, kidney & bladder cancer] |
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| See also: INTRODUCTION |