4-Amino-5-hydroxynaphthalene-2,7-disulphonic acid with a purity by weight of 80 % or more (CAS RN 90-20-0)
Part of: 292221 — Amino-naphthols and other amino-phenols, other than those containing more than one kind of oxygen function, their ethers and esters; salts thereof — Aminohydroxynaphthalenesulphonic acids and their salts
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