国产精品无码av在线_最新毛片视频在线看国产视频_无码熟妇人妻肥屁av在线互动交流_波多野结衣50连精喷在线_国产成人网红vip福利播放_bt天堂在线www中文_自拍偷自拍亚洲精品图区_成年美女啪啪拍网站免费vip_爽爽影院免费观看视频_了解最新青草青精品视频

Banner
?
Cysteine
-2020-11-11 14:06:55-
Product features
L(+) -cysteine, molecular formula C3H7NO2S, molecular weight 121.16, CAS: 52-90-4.Colorless crystal.Soluble in water, ethanol, acetic acid and ammonia, insoluble in ether, acetone, ethyl acetate, benzene, carbon disulfide and carbon tetrachloride.It can be oxidized by air to cystine in neutral and weakly alkaline solutions.