3-Hydroxynaphthalene-2,7-disulphonic acid is a naphthalene sulfonic acid derivative used as an intermediate in the production of dyes and pigments. It is a solid compound characterized by its naphthalene ring system with sulfonic acid and hydroxyl functional groups.
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2-Naphthalenesulfonic acid, 6-(acetylamino)-
naphthalene sulfonic acid dye intermediate
1-Naphthalenesulfonic acid, 5,6-diamino-
naphthalene sulfonic acid dye intermediate
3H-IndoliuM, 2-[5-[1-[6-[(3-azidopropyl)aMino]-6-oxohexyl]-1,3-dihydro-3,3-diMethyl-5-sulfo-2H-indol-2-ylidene]-1,3-pentadien-1-yl]-1,3,3-triMethyl-5-sulfo-, inner salt
fluorescent dye for labeling
Copper perchlorophthalocyanine
green pigment for inks and coatings
Fluorescent brightener 393
optical brightener for fabrics and paper
Benzenediazonium, 4-(benzoylamino)-2,5-diethoxy-
dye intermediate
Disodium 3-hydroxynaphthalene-2,7-disulfonate
Dye intermediate
The international HS code for 3-Hydroxynaphthalene-2,7-disulphonic acid (CAS 148-75-4) 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.
3-hydroxynaphthalene-2,7-disulfonic acid
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C1=CC(=CC2=CC(=C(C=C21)O)S(=O)(=O)O)S(=O)(=O)O
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