3,3'-Dichlorobenzidine (and its salts)
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CAS
91-94-1
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NH2ClC6H3C6H3ClNH2
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RTECS
DD0525000
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Synonyms & Trade Names
4,4'-Diamino-3,3'-dichlorobiphenyl; Dichlorobenzidine base; o,o'-Dichlorobenzidine; 3,3'-Dichlorobiphenyl-4,4'-diamine; 3,3'-Dichloro-4,4'-biphenyldiamine; 3,3'-Dichloro-4,4'-diaminobiphenyl
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DOT ID & Guide
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Exposure
Limits
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NIOSH REL: Ca See Appendix A
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OSHA PEL: [1910.1007] See Appendix B
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IDLH
Ca [N.D.]
See: IDLH INDEX
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Conversion
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Physical Description
Gray to purple, crystalline solid.
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MW: 253.1
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BP: 788°F
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MLT: 271°F
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Sol(59°F): 0.07%
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VP: ?
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IP: ?
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Sp.Gr: ?
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Fl.P: ?
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UEL: ?
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LEL: ?
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Incompatibilities & Reactivities
None reported
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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
Skin sensitization, dermatitis; headache, dizziness; caustic burns; frequent urination, dysuria; hematuria (blood in the urine); gastrointestinal upset; upper respiratory infection; [potential occupational carcinogen]
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Target Organs
Bladder, liver, lung, skin, gastrointestinal tract
Cancer Site
[in animals: liver & bladder cancer]
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See also: INTRODUCTION
See ICSC CARD: 0481 See MEDICAL TESTS: 0074
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