C10H8O4S
224.23 g/mol
Dye & PigmentWarning
1-NAPHTHOL-4-SULFONIC ACID
CAS84-87-7EC201-568-4
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
dye intermediate
1-Naphthol-4-sulfonic acid is a naphthalene derivative with a hydroxyl and a sulfonic acid group. It is used as a dye intermediate in the production of various colorants.
dye intermediatelaboratory reagent for reaction electrophoresis
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-Naphthol-5-sulfonic acid
CAS117-59-9
Dye intermediate for azo dyes
ReferenceSame Category
1-naphthylamine-5-sulfonic acid
CAS84-89-9
dye intermediate
ReferenceSame Category
1-Naphthalenesulfonic acid, 5,6-diamino-
CAS84-92-4
naphthalene sulfonic acid dye intermediate
ReferenceSame Category
Solvent yellow 14
CAS842-07-9
Dye for hydrocarbon solvents and oils
ReferenceSame Category
5-amino-6-chloro-O-cresol
CAS84540-50-1
Hair dye ingredient
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
Customs Tariff Classification
The international HS code for 1-NAPHTHOL-4-SULFONIC ACID (CAS 84-87-7) 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-1-sulfonic acid
InChIKey
HGWQOFDAUWCQDA-UHFFFAOYSA-N
SMILES
C1=CC=C2C(=C1)C(=CC=C2S(=O)(=O)O)O
Synonyms (17)
- 1,4-Oxy Acid
- 1,4-naphthol sulfonic acid
- 1-NAPHTHOL-4-SULFONIC ACID
- 1-Naphtho-4-sulfonic acid
- NW Acid
- Nevile and Winther's acid
- Neville-winther acid
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