fluorescent whitening agent er was synthesized by the esterification reaction of phosphorous ether with o cyanobenzyl chloride dissolved in benzene.
用苯溶解邻氰基氯芐,再与亚磷酸三乙酯进行酯化反应,合成荧光增白剂er。
this paper studies the preparation of cyanobenzyl azo-dye. the optimal conditions for reaction were determined and properties of the dye were discussed.