What is Sulfonic para base ester

Sulfonic para base ester is mainly used in the synthesis of KN, M and other reactive dyes. Due to the introduction of a sulfonic acid group in the amino ortho-position of the original para-ester molecule

What is para-ester

para-ester is one of the important intermediates of reactive dyes, which is used to synthesize EF, KN, M/KM and other reactive dyes containing vinyl sulfone. The production proportion of reactive dyes containing vinyl sulfone group has increased significantly year by year, and has developed into the largest category of reactive dyes, which occupies a very important position in the production and research field of reactive dyes.