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3-o-ethyl ascorbic acid
Ethyl Ascorbic Acid, 3-O-Ethyl-L-ascorbic acid
Molecular Weight: 204.17728 Cas No:86404-04-8
Antioxidant, Whitening
[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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