H acid
H acid is a chemical substance mainly used in the production of acidic, direct and reactive dyes, such as acid fuchsin 6B, acid red G, acid black 10B, direct black, active bright red K-2BP, active violet K-3R, active blue K-R and more than 90 kinds, these dyes are used for wool spinning, cotton fabric dyeing. It can also be used in the production of drugs.