Benzidine
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CAS
92-87-5
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NH2C6H4C6H4NH2
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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.]
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DOT ID & Guide
1885 / 153
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Exposure
Limits
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NIOSH REL: Ca See Appendix A See Appendix C
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OSHA PEL: [1910.1010] See Appendix B See Appendix C
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IDLH
Ca [N.D.]
See: IDLH INDEX
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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
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BP: 752°F
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MLT: 239°F
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Sol(54°F): 0.04%
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VP: Low
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IP: ?
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Sp.Gr: 1.25
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Fl.P: ?
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UEL: ?
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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
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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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
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Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
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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
See ICSC CARD: 0224 See MEDICAL TESTS: 0023
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