Photoresist Chemicals TIANFU-CHEM 2-Naphthalenesulfonicacid, 6-amino-5-[2-(4-chloro-5-methyl-2-sulfophenyl)diazenyl]-4-hydroxy-,sodium salt (1:2) Cas：94159-49-6 Molecular Formula：C17H14 Cl N3 O7 S2 . 2 Na