亚洲精品aⅴ在线观看,综合久久狠狠色99h中午,欧美日韩中文 ,天天摸天天爽天天碰天天弄,国外自产拍无码精品视频在线观看,91成人免费福利网

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

CollectionHomepage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