| production method | 2-chloro-5-nitrobenzenesulfonic acid, ethylenediamine, tetrachlorobenzoquinone, cyanuric chloride and M-aminobenzenesulfonic acid as raw materials. First, 2-chloro-5-nitrobenzenesulfonic acid is condensed with ethylenediamine, and then its nitro group is reduced. It is then condensed with tetrachlorobenzoquinone to give the [oroxazine] Intermediate. The product is condensed with cyanuric chloride and finally with M-aminobenzenesulfonic acid. After salting out, filtration, drying to obtain the finished product.. |