Preparation of 2-nitroaniline-4-sulfonic acid_Kain Industrial Additive

Background and overview[1] 2-Nitroaniline-4-sulfonic acid is an important intermediate in the synthesis of organic pigments. Using it as a diazo component, a series of pigment varieties with excellent performance can be produced, such as C.1. Pigment Yellow 61, 62, 165, 169, etc. According to literature reports, the synthesis methods of this intermediate include the ammonolysis…