C14H18Cl2N2
285.2 g/mol
Dye & PigmentDanger
O-Tolidine dihydrochloride
CAS612-82-8EC210-322-5
Category
Dye & Pigment
Compound Class
Amine
Primary Use
dye intermediate and reagent
o-Tolidine dihydrochloride is a salt form of 3,3'-dimethylbenzidine, commonly used as a dye intermediate and reagent. The National Toxicology Program has identified it as a substance that can cause cancer.
dye intermediatereagent for detecting 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 612-82-8
Related Compounds
StrongSame Parent
O-tolidine
CAS119-93-7
Intermediate for dyes and pigments
ReferenceSame Category
3,3'-dichlorobenzidine dihydrochloride
CAS612-83-9
Intermediate for azo dyes and pigments
ReferenceSame Category
Solvent Red 212
CAS61300-98-9
solvent red dye
ReferenceSame Category
2,5-diaminotoluene sulfate
CAS615-50-9
Ingredient in hair dyes and fur dyes
ReferenceSame Category
2-chloro-p-phenylenediamine
CAS615-66-7
component in hair dyes
Safety Reference
Danger
H302Harmful if swallowed
H350May cause cancer
H411Toxic to aquatic life with long lasting effects
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects
H335May cause respiratory irritation
H372Causes damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for O-Tolidine dihydrochloride (CAS 612-82-8) is 2921.59.
HS code (international, 6-digit)
2921.59
EU CN code (8-digit)
2921 59 90
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;dihydrochloride
InChIKey
LUKPNZHXJRJBAN-UHFFFAOYSA-N
SMILES
CC1=C(C=CC(=C1)C2=CC(=C(C=C2)N)C)N.Cl.Cl
Synonyms (17)
- 3,3'-Dimethylbenzidine.2HCl
- DMB dihydrochloride
- o-Tolidine dihydrochloride