久草剧场I亚洲天天在线日亚洲洲精I亚洲精品www久久久久久I伊人资源视频在线I中文字幕高清I久久人人97超碰国产公开结果I亚洲成人国产精品I999久久国产I日韩试看I亚洲成人第一区I亚洲黄色片在线I国产精品私人影院I天天操天天干天天综合网I激情婷婷在线I激情丁香I国产精品videoxxxxI夜夜躁天天躁很躁波

Product Name： 2,2'-Bis(trifluoromethyl)benzidine
Other Name： 2,2'-Bis(trifluoromethyl)-4,4'-diamino biphenyl;2,2'-Bis(trifluoromethyl)benzidine
Purity:≥99%
Appearance:White Powder
Melting point: 183 ℃
Boiling point: 376.9 ℃ at760mmHg
Ignition point: 171.4 ℃

Application: Liquid crystal intermediate, used for the production of polyimide