C10H8O7S2
304.3 g/mol
Dye & PigmentDanger
1-Naphthol-3,6-disulfonic acid
CAS578-85-8EC209-432-6
Category
Dye & Pigment
Compound Class
Organic Acid
Primary Use
intermediate for azo dyes
1-Naphthol-3,6-disulfonic acid is an organic compound used primarily as an intermediate in the production of azo dyes. It features a naphthalene ring system with hydroxyl and sulfonic acid groups, giving it high water solubility and suitability for dye synthesis.
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
SimilarStructure SimilarSimilarity 0.77
1-hydroxy-6-amino-3-naphthalenesulfonic acid
CAS87-02-5
dye intermediate
SimilarStructure SimilarSimilarity 0.77
Rhoduline acid
CAS87-03-6
dye intermediate
ApplicationSame Use
7-(Benzoylamino)-4-hydroxy-2-naphthalenesulfonic acid
CAS132-87-6
intermediate for azo dyes
ApplicationSame Use
Amido-G-acid
CAS86-65-7
intermediate for azo dyes
ApplicationSame Use
Dehydrothio-p-toluidine
CAS92-36-4
intermediate for azo dyes
ApplicationSame Use
2-naphthylamine-6-sulfonic acid
CAS93-00-5
intermediate for azo dyes
ReferenceSame Category
Disodium chromotropate dihydrate
CAS5808-22-0
dye and pigment intermediate
ReferenceSame Category
2-(4-(diethylamino)-2-hydroxybenzoyl)benzoic acid
CAS5809-23-4
Intermediate for thermal and pressure sensitive dyes
Safety Reference
Danger
H314Causes severe skin burns and eye damage
H318Causes serious eye damage
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 1-Naphthol-3,6-disulfonic acid (CAS 578-85-8) is 2908.99.
HS code (international, 6-digit)
2908.99
EU CN code (8-digit)
2908 99 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
4-hydroxynaphthalene-2,7-disulfonic acid
InChIKey
TZBROGJRQUABOK-UHFFFAOYSA-N
SMILES
C1=CC2=C(C=C(C=C2C=C1S(=O)(=O)O)S(=O)(=O)O)O
Synonyms (8)
- 1-Naphthol, 3,6-disulfo-
- 1-Naphthol,6-disulfo-
- 2, 4-hydroxy-
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