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3-o-ethyl ascorbic acid
Ethyl Ascorbic Acid, 3-O-Ethyl-L-ascorbic acid
3-O-乙基抗壞血酸醚, 乙基抗壞血酸, 乙基維他命C, 3-o-乙基抗壞血酸
分子量:204.17728 Cas No:86404-04-8
美白成份、抗氧化,醚類維他命C衍生物,抑制黑色素形成及防止色素斑的形成。

衛生署原公告為含有醫療或毒劇藥品之化妝品,添加此成份之產品需向衛生署登記為含藥化妝品,產品中限量1%~2%[1]。衛生署於2010/05/19公告,改列為一般化妝品無需登記。
[1] 行政院衛生署衛署藥字第0940338424號,94/10/27。

A very stable and promising form of the skincare superstar, Vitamin C. If you do not know why Vitamin C is such a big deal in skin care, you can catch up here. In short, Vitamin C has three proven magic abilities: antioxidant, collagen booster, and skin brightener. The problem, though, is that it's very unstable, turns brown and becomes ineffective in no time (after a few month) and the cosmetics industry is trying to come up with smart derivatives that are stable and have the magic properties of pure Vitamin C.

Ethyl Ascorbic Acid or EAC for short is an "etherified derivative of ascorbic acid" that consists of vitamin C and an ethyl group bound to the third carbon position. This makes Vitamin C very stable and soluble in both water and oil.

https://incidecoder.com/ingredients/ethyl-ascorbic-acid

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