CAS 304655-82-1 appears in our catalog under these names: 2,7-Naphthalenedisulfonic acid, 4-hydroxy-5-[[(2-hydroxyphenyl)methylene]amino]-, sodium salt, hydrate (1:1:1), 97%, 97%, Azomethine-H monosodium salt monohydrate, Azomethine H monosodium salt monohydrate, 95%, Sodium 4-hydroxy-5-((2-hydroxybenzylidene)amino)-7-sulfonaphthalene-2-sulfonate hydrate 97%, Azomethine-H monosodium salt monohydrate, min. 85 %, 25 g. Offered by: Chemat, Biosynth, Thermo Scientific (Acros), Ambeed, Roth. Available pack sizes: 250mg, 1g, 5g, 50g, 25g, 100g, 250g, 500g.