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Home/Compounds/Dye & Pigment/1-Naphthol-8-sulfonic acid
C10H8O4S
224.23 g/mol
Dye & Pigment

1-Naphthol-8-sulfonic acid

CAS117-22-6EC204-180-3
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
dye intermediate

1-Naphthol-8-sulfonic acid is an organic compound containing a naphthalene ring substituted with a hydroxyl group and a sulfonic acid group. It is used primarily as an intermediate in the production of dyes and pigments.

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

ReferenceSame Category

8-amino-1,3,6-naphthalenetrisulfonic acid

CAS117-42-0

Dye intermediate

ReferenceSame Category

8-Hydroxynaphthalene-1,6-disulfonic acid

CAS117-43-1

Dye intermediate for naphthol sulfonic acids

ReferenceSame Category

2,7-Naphthalenedisulfonic acid, 4-(benzoylamino)-5-hydroxy-

CAS117-46-4

dye intermediate

ReferenceSame Category

1-naphthol-4,8-disulfonic acid

CAS117-56-6

naphthol disulfonic acid intermediate for dyes

Customs Tariff Classification

The international HS code for 1-Naphthol-8-sulfonic acid (CAS 117-22-6) 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

8-hydroxynaphthalene-1-sulfonic acid

InChIKey

ZPLBZGGKAUXTRT-UHFFFAOYSA-N

SMILES

C1=CC2=C(C(=C1)O)C(=CC=C2)S(=O)(=O)O

Synonyms (9)
  • 1-Naphthol-8-sulfonic acid
  • 1-Naphthol-8-sulphonic acid
  • Naphtholmonosulfonic acid S

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