J Acid C10H9NO4S

Dye intermediates. Mainly used for the preparation of direct Qinglian R, direct fast blue FRL, direct fast ash 2BL, direct copper salt blue 2R, direct acid-resistant purple, direct pink, direct copper-dyed navy, light-fast blue B2R, direct jujube GB, and activity Red, orange, brilliant orange X-GN, gray, grass green, red brown and other dyes. Also used in the preparation of double J acid, scarlet acid and phenyl J acid, etc.