sodium 2-[(1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridyl)azo]naphthalene-1-sulphonate;2-[[(1-Ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxopyridin)-3-yl]azo]-1-naphthalenesulfonic acid sodium salt;Einecs 284-494-5
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