在南通酒店晚上怎么叫服务

在南通酒店晚上怎么叫服务

sell 4,4'-Diaminodiphenylsulfone; 4,4'-Diaminodiphenyl sulfone; Dapsonum; Bis(4-aminophenyl)sulfone; 80-08-0

4,4'-Diaminodiphenylsulfone be used for preparation polyimide, polyamide and epoxy resin material.