C12H12Cl4N2
326 g/mol
Dye & PigmentDanger
3,3'-DICHLOROBENZIDINE DIHYDROCHLORIDE
CAS612-83-9EC210-323-0
Category
Dye & Pigment
Compound Class
Amine
Primary Use
Intermediate for azo dyes and pigments
3,3'-Dichlorobenzidine dihydrochloride is a chlorinated aromatic amine compound used primarily as an intermediate in the production of azo dyes and pigments. Its significance lies in its role in manufacturing diarylide yellow pigments, which are commonly used in printing inks, though its use in dyes has declined due to carcinogenicity concerns.
Production of diarylide yellow pigmentsIntermediate for printing inks
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 612-83-9
Related Compounds
StrongSame Parent
3,3'-dichlorobenzidine
CAS91-94-1
Intermediate for azo dyes and pigments
ApplicationSame Use
O-nitroaniline
CAS88-74-4
Intermediate for azo dyes and pigments
ApplicationSame Use
4-chloro-2-methylaniline
CAS95-69-2
Intermediate for azo dyes and pigments
ApplicationSame Use
3-hydroxy-2-naphthoic acid
CAS92-70-6
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
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component in hair dyes
ReferenceSame Category
Manganese acetate tetrahydrate
CAS6156-78-1
Mordant in dyeing and pigment
Safety Reference
Danger
H312Harmful in contact with skin
H317May cause an allergic skin reaction
H350May cause cancer
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects
H411Toxic to aquatic life with long lasting effects
H318Causes serious eye damage
H335May cause respiratory irritation
H341Suspected of causing genetic defects
H351Suspected of causing cancer
H303May be harmful if swallowed
H319Causes serious eye irritation
Customs Tariff Classification
The international HS code for 3,3'-DICHLOROBENZIDINE DIHYDROCHLORIDE (CAS 612-83-9) 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-chlorophenyl)-2-chloroaniline;dihydrochloride
InChIKey
BXAONUZFBUNTQR-UHFFFAOYSA-N
SMILES
C1=CC(=C(C=C1C2=CC(=C(C=C2)N)Cl)Cl)N.Cl.Cl
Synonyms (12)
- 3,3'-Dichlorobenzidine.2HCl
- DICHLODINE H