for the following products
4-Hydroxy-5-[salicylideneamino]-2,7-naphthalenedisulfonic acid sodium salt | 8-Hydroxy-1-(salicylideneamino)naphthalene-3,6-disulfonic acid monosodium salt | Azomethine H | Sodium 4-hydroxy-5-[(E)-[(2-hydroxyphenyl)methylidene]amino]-7-sulfonaphthalene-2-sulfonate and Azomethine-h monosodium salt
