Safety Reference
Warning
H317May cause an allergic skin reaction
H373May cause damage to organs through prolonged or repeated exposure
Sourcing Naphthol Yellow S?
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fluorescent dye for labeling
Sourcing Naphthol Yellow S?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Naphthol Yellow S is an organic sodium salt and the disodium salt of 5,7-dinitro-8-hydroxynaphthalene-2-sulfonic acid. It is primarily used as a histological dye and an acid yellow dye.
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 Naphthol Yellow S (CAS 846-70-8) is 3204.12.
3204.12
3204 12 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;5,7-dinitro-8-oxidonaphthalene-2-sulfonate
CTIQLGJVGNGFEW-UHFFFAOYSA-L
C1=CC2=C(C=C1S(=O)(=O)[O-])C(=C(C=C2[N+](=O)[O-])[N+](=O)[O-])[O-].[Na+].[Na+]