国产精品自在在线午夜出白浆,亚洲不卡2卡3卡4卡5卡入口,午夜无码最新福利片,丁香婷婷五月天激情综合网,国产亚洲欧美电影在线观看

Huatai new products:

86404-04-8   3-O-Ethyl-L-ascorbic acid

White to Off-white  solid  ＞98%

Can be customized production

3-O-Ethyl-L-ascorbic acid is a cosmetic tyrosinase inhibitor with whitening ability and is a stabilized vitamin C derivative. It also has antioxidant properties.