Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
Sourcing 1-NAPHTHOL-4-SULFONIC ACID?
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dye intermediate
Sourcing 1-NAPHTHOL-4-SULFONIC ACID?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
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.
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.
The international HS code for 1-NAPHTHOL-4-SULFONIC ACID (CAS 84-87-7) is 2908.99.
2908.99
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.
4-hydroxynaphthalene-1-sulfonic acid
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