SKIN EXTERNAL PREPARATION AND METHOD OF PRODUCING SAME

摘要

A skin external preparation containing an ascorbic acid-2 -phosphate derivative is characterized in that only a sodium ascorbic acid-2 -phosphate-6-palmitate is formulated as the ascorbic acid-2-phosphate derivative, and the skin preparation further includes at least one betaine-type amphoteric surfactant selected from the group consisting of compounds represented by the following general formula (1) or (2) (wherein R1 represents a linear or branched alkyl group of 6 to 30 carbon atoms, and R2 represents a linear or branched alkyl group of 8 to 30 carbon atoms). R1-N+(CH3)2-CH2COO- (1) R2-CONH-CH2-CH2-CH2-N+(CH3)2-CH2COO" (2)