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 2,2'-Dimethyl-biphenyl-4,4'-diamine; 2,2'-Dimethyl-4,4'-diaminobiphenyl; 2,2'-Dimethylbenzidine; 2,2'-Tolidine; 4,4'-Diamino-2,2'-dimethylbiphenyl; m-Tolidine; 84-67-3

2,2'-Dimethylbenzidine be used for preparation polyimide and epoxy resin material.