Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
Sourcing R salt?
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2,6-Naphthalenedisulfonic acid disodium salt
Dye intermediate
Sourcing R salt?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
R salt is the disodium salt of 3-hydroxynaphthalene-2,7-disulfonic acid, commonly used as a dye intermediate in the production of azo dyes and other 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 R salt (CAS 135-51-3) 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.
disodium;3-hydroxynaphthalene-2,7-disulfonate
VNEBWJSWMVTSHK-UHFFFAOYSA-L
C1=CC(=CC2=CC(=C(C=C21)O)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]