Abstract
2, 3, 5, 6-O-tetra-esters of L-ascorbic acid (fatty acid: 2-ethylhexanoic acid, 3, 5, 5-timethylhexanoic acid, isopalmitic acid, isostearic acid) have better performance, such as;
1) They are colorless clear liquids and almost soluble in oily materials.
2) They are thermally stable without deterioration in color
3) They are very safe materials.
4) The stability of the pigment dispersion (tianium dioxide, zinc oxide, calcium phosphate hydroxide) is favorable.
5) They have the high moisture permeability.
6) They have SOD-like activites.
7) They are casily obtained without protecting the L-ascorbic acid or the derivative thereof such as 5, 6-O-isopropyridene-L-ascorbic acid.
Therefore, a new type of application for cosmetics has been derived from 2, 3, 5, 6-O-tetra-esters of L-ascorbic acid with these desired properties.
