欧美性理论片在线观看片免费_日本人AA片免费观看_国产日本欧美亚洲精品视_欧美娇小18videos

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

CollectionHomepage中文版

More>>
Catechol
Product name: Catechol
CAS NO: 120-80-9
Molecular weight: 110.1106 
EC NO: 204-427-5
Molecular formula: C6H6O2
InChI: InChI=1/C6H6O2/c7-5-3-1-2-4-6(5)8/h1-4,7-8H
Structural formula:
  Order                   Back