Calmagite 0.1% w/v aqueous indicator solution (for water hardness) CAS 3147-14-6

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Also known as 3-Hydroxy-4-(6-hydroxy-m-tolylazo)naphthalene-1-sulphonic acid · 1-(1-Hydroxy-4-methyl-2-phenylazo)-2-naphthol-4-sulfonic acid · 1-Naphthalenesulfonic acid, 3-hydroxy-4-[(2-hydroxy-5-methylphenyl)azo]- · (4Z)-4-[(2-hydroxy-5-methylphenyl)hydrazinylidene]-3-oxonaphthalene-1-sulfonic acid · 1-Naphthalenesulfonic acid,3-hydroxy-4-[(2-hydroxy-5-methylphenyl)azo]- · 3-Hydroxy-4-((6-hydroxy-m-tolyl)azo)-1-naphthalenesulfonic acid · 1-Naphthalenesulfonic acid, 3-hydroxy-4-[(6-hydroxy-m-tolyl)azo]- · 1-Naphthalenesulfonic acid, 3-hydroxy-4-((2-hydroxy-5-methylphenyl)azo)-