.beta.-Naphthol-8-sulfonic acid sodium salt 1-Naphthalenesulfonic acid, 7-hydroxy-, monosodium salt 2-Naphthol-8-sodium sulfonate 2-Naphthol-8-sulfonic acid sodium salt 832-85-9 Bayer's acid sodium salt Bayer-acid sodium Croceic acid, sodium salt NSC9835 Sodium 2-naphthol-8-sulfonate