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Synonyms: 4,4'-Diamino-3,3'-dimethylbiphenyl; Diaminoditolyl; 3,3'-Dimethylbenzidine; 3,3'-Dimethyl-4,4'-diphenyldiamine; 3,3'-Tolidine
OSHA IMIS Code Number: T169
Chemical Abstracts Service (CAS) Registry Number: 119-93-7
NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: DD1225000; 14667
NIOSH Pocket Guide to Chemical Hazards, o-Tolidine: Chemical description, physical properties, potentially hazardous incompatibilities, and more
International Agency for Research on Cancer (IARC): Group 2B, possibly carcinogenic to humans (3,3'-Dimethylbenzidine and 3,3'-dimethylbenzidine-based dyes) [479 KB PDF, 63 pages]
Primary Laboratory Sampling/Analytical Method (SLC1):
Wipe Sampling Method: Yes, with Glass Fiber Filter
Bulk Method: Protect samples from heat and light. This method does not differentiate between different o-Toliding based dyes. For any dye analysis, a bulk sample of the dye must be sent to the SLCAL. Limit the amount of bulk submitted to one gram or one mL.
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Page last updated: 08/24/1992
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