国产精品人妇原创在线播放_国产内射一级一片内射精品视频_中文字幕亚洲制服在线看_国产真实偷人视频A-国产亚洲精品天堂-久久国产麻豆黄片-久久天堂国产精品-91欧美

Welcome to visit Changzhou Chengbang Chemical Co., Ltd. official website!

Collection ｜Homepage ｜中文版

More>>
Paraformaldehyde
Product name: Paraformaldehyde
CAS NO: 30525-89-4
Molecular weight: 30n 
EC NO: NA
Molecular formula: (CH2O)n
InChI: InChI=1/C3H8O/c1-3-4-2/h3H2,1-2H3
Structural formula:
  Order                   Back