| Agent Name |
o-Tolidine |
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| Alternative Name |
3,3'-Dimethylbenzidine |
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| CAS Number |
119-93-7 |
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| Formula |
C14-H16-N2 |
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| Major Category |
Nitrogen Compounds |
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| Synonyms |
2-Tolidin [German]; 2-Tolidina [Italian]; 2-Tolidine; 3,3'-Dimethyl-(1,1'-biphenyl)-4,4'-diamine; 3,3'-Dimethyl-4,4'-biphenyldiamine; 3,3'-Dimethyl-4,4'-diaminobiphenyl; 3,3'-Dimethyl-4,4'-diphenyldiamine; 3,3'-Dimethylbenzidine; 3,3'-Tolidine; 4,4'-Bi-o-toluidine; 4,4'-Di-o-toluidine; 4,4'-Diamino-3,3'-dimethylbiphenyl; 4,4'-Diamino-3,3'-dimethyldiphenyl; Bianisidine; C.I. 37230; C.I. Azoic Diazo Component 113; CI 37230; CI Azoic diazo component 113; Diaminoditolyl; Diaminotolyl; Fast Dark Blue Base R; Orthotolidine; o-Tolidine; [ChemIDplus] |
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| Category |
Amines, Aromatic |
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| Description |
White to reddish crystals or powder. [Note: Darkens on exposure to air. Often used in paste or wet cake form. Used as a basis for many dyes.]; [NIOSH] |
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| Sources/Uses |
Used as an intermediate in the production of dyes and pigments; used as a curing agent for polyurethane elastomers, coatings, and rigid foams; [HSDB] |
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| Comments |
A carcinogen in experimental animals; [HSDB] In subchronic feeding studies, animals develop liver and kidney damage and bone marrow depression. [ACGIH] |
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| Exposure Assessment |
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| Skin Designation (ACGIH) |
Yes |
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| Vapor Pressure |
6.92 x 10 -07 mm Hg |
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| Explanatory Notes |
Carcinogen--No TLV; NIOSH recommends 60 minute ceiling of 0.02 mg/m3; Flash point = 137 deg C; |
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| Adverse Effects |
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| Hepatotoxin |
Hepatotoxin, Secondary |
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| IARC Carcinogen |
Possible Carcinogen |
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| Links to Other NLM Databases |
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| Health Studies |
Human Health Effects from Hazardous Substances Data Bank: 3,3'-DIMETHYLBENZIDINE
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