| production method | with 2-naphthylamine -3,6, 8-trisulfonic acid, M-urinary aniline, cyanuric chloride and m-(β-sulfate ethyl sulfone) aniline as raw materials. First, the M-urinary aniline is condensed with cyanuric chloride, and then 2-naphthylamine -3,6, 8-trisulfonic acid is diazotized and coupled with the aforementioned condensation product, finally, the coupling product is condensed with M (β-sulfate ethyl sulfone) aniline to give the desired product. After salting out, filtration, drying to obtain the finished product.. |