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English Name: 4B Acid
CAS No.: 88-44-8
Molecular formula: C7H9NO3S
Molecular weight: 187.22
EINECS No.: 201-831-3
Chemical properties: acicular crystal. Melting point > 300 ℃, soluble in 214 parts of water at 20 ℃. At 130 ℃, it decomposes in water, and copper dioxide added to the aqueous solution is red.
Application: dye intermediate. 4b acid is coupled with 2,3-acid to produce pigment red 6B and lisolebo red Bk; The pigment yellow brilliant red BL can be prepared by coupling with 2-naphthol. These pigments are widely used in the coloring of inks, plastics, rubber, wires and cables, daily chemicals and other products.
Manufacturing
