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3,3'-Dichlorobenzidine (and its salts)

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
CAS No.
91-94-1
RTECS No.
DD0525000
DOT ID & Guide
Formula
NH2ClC6H3C6H3ClNH2
Conversion
IDLH
Ca [N.D.]
See: IDLH INDEX
Exposure Limits
NIOSH REL
: Ca See Appendix A
OSHA PEL
: [1910.1007] See Appendix B
Measurement Methods

NIOSH 5509;
OSHA 65
See: NMAM or OSHA Methods
Physical Description
Gray to purple, crystalline solid.
MW:
253.1
BP:
788°F		 MLT: 271°F Sol(59°F): 0.07%
VP:
?
IP:
?
Sp.Gr:
?
Fl.P:
?
UEL:
?
LEL:
?
Incompatibilities & Reactivities
None reported
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
Skin sensitization, dermatitis; headache, dizziness; caustic burns; frequent urination, dysuria; hematuria (blood in the urine); gastrointestinal upset; upper resp infection; [potential occupational carcinogen]
Target Organs
Bladder, liver, lung, skin, gastrointestinal tract
Cancer Site
[in animals: liver & 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: 0481   See MEDICAL TESTS: 0074
 

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