C10H9NO6S2
303.3 g/mol
Dye & PigmentWarning
2-Amino-4,8-naphthalenedisulfonic acid
CAS131-27-1EC205-020-5
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
Dye intermediate
2-Amino-4,8-naphthalenedisulfonic acid is a disulfonated naphthalene derivative containing an amino group, commonly used as a dye intermediate in the manufacture of azo dyes.
Dye intermediateDyes
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.
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Related Compounds
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4-Hydroxy-6-(3-sulphoanilino)naphthalene-2-sulphonic acid
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Dye intermediate
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2,4-Dimethylaniline-6-sulfonic acid
CAS88-22-2
Dye intermediate
ReferenceSame Category
Anatase
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White pigment in paints and coatings
ReferenceSame Category
Rutile
CAS1317-80-2
White pigment in paints and coatings
ReferenceSame Category
Iron phthalocyanine
CAS132-16-1
Phthalocyanine dye and pigment
ReferenceSame Category
3-Hydroxy-N-naphthalen-1-ylnaphthalene-2-carboxamide
CAS132-68-3
Naphthol dye intermediate
Safety Reference
Warning
H319Causes serious eye irritation
Customs Tariff Classification
The international HS code for 2-Amino-4,8-naphthalenedisulfonic acid (CAS 131-27-1) is 2921.45.
HS code (international, 6-digit)
2921.45
EU CN code (8-digit)
2921 45 00
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
3-aminonaphthalene-1,5-disulfonic acid
InChIKey
MTJGVAJYTOXFJH-UHFFFAOYSA-N
SMILES
C1=CC2=C(C=C(C=C2S(=O)(=O)O)N)C(=C1)S(=O)(=O)O
Synonyms (19)
- 4,8-Disulfo-2-naphthalamine
- 4,8-Disulfo-2-naphthylamine
- Acid IV
- C acid
- Kyselina C
- Kyselina C [Czech]
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