C14H16N2
212.29 g/mol
Industrial ChemicalDanger
O-Tolidine
CAS119-93-7EC204-358-0
Category
Industrial Chemical
Compound Class
Amine
Primary Use
Intermediate for dyes and pigments
o-Tolidine (3,3'-dimethylbenzidine) is an industrial chemical used primarily as an intermediate in the production of dyes and pigments. It is also employed as a curing agent for polyurethane elastomers and coatings, and as a sensitive reagent for detecting gold and free chlorine in water.
Intermediate for the production of dyes and pigmentsCuring agent for polyurethane elastomers, coatings, and rigid foamsReagent for detection of gold and free chlorine in water
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
Relevant lists:California Proposition 65
CAS 119-93-7
Related Compounds
StrongSame Parent
O-tolidine dihydrochloride
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dye intermediate and reagent
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Intermediate for dyes and pigments
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Intermediate for dyes and pigments
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chemical intermediate
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2,4-Dichlorobromobenzene
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Industrial chemical intermediate
Safety Reference
Danger
H302Harmful if swallowed
H350May cause cancer
H411Toxic to aquatic life with long lasting effects
H372Causes damage to organs through prolonged or repeated exposure
H373May cause damage to organs through prolonged or repeated exposure
H341Suspected of causing genetic defects
H401Toxic to aquatic life
H351Suspected of causing cancer
Customs Tariff Classification
The international HS code for O-Tolidine (CAS 119-93-7) is 2921.59.
HS code (international, 6-digit)
2921.59
EU CN code (8-digit)
2921 59 50
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
4-(4-amino-3-methylphenyl)-2-methylaniline
InChIKey
NUIURNJTPRWVAP-UHFFFAOYSA-N
SMILES
CC1=C(C=CC(=C1)C2=CC(=C(C=C2)N)C)N
Synonyms (46)
- 2-Tolidin
- 2-Tolidin [German]
- 2-Tolidina
- 2-Tolidina [Italian]
- 2-Tolidine
- 3,3'-DIMETHYLBENZIDINE
- 3,3'-Dimethylbenzidin
- 3,3'-Tolidine
- 4,4'-Bi-o-toluidine
- 4,4'-Bianisidine
- 4,4'-Di-o-toluidine
- Benzidine, 3,3'-dimethyl-
- Bianisidine
- DIMETHYLBENZIDINE, 3,3'-
- Diaminoditolyl
- Diaminotolyl
- Fast Dark Blue Base R
- Orthotolidine
- Tolidine, o-
- o,o'-Tolidine
- o-Tolidin
- o-Tolidine
- o-Tolidine, >=97%, powder
- o-Tolidine, Powder, Reagent
- o-Tolidine, minimum
- o-Tolidine, p.a.
- tolidine blue