Crystalline 2-O-.alpha.-D-glucopyranosyl-L-ascorbic acid, and its preparation and uses
AssigneeKabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo
InventorsShuzo Sakai, Masaru Yoneyama, Toshio Miyake
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Abstract
2-O-.alpha.-D-Glucopyranosyl-L-ascrobic acid is crystallizable in its supersaturated solution. Crystalline 2-O-.alpha.-D-glucopyranosyl-L-ascorbic acid is substantially nonhygroscopic, free flowing, free of deliquescence, consolidation and direct reducing activity, but is readily soluble in water. Because of these, characteristics crystalline 2-O-.alpha.-D-glucopyranosyl-L-ascorbic acid is handleable with an ease, and superiorly high in stability and physiological activities. Thus, crystalline 2-O-.alpha.-D-glucopyranosyl-L-ascorbic acid is favorably useful in vitamin C-enriching agents, foodstuffs, pharmaceuticals and cosmetics.
Claims11
A method for stabilizing L-ascorbic acid comprising reacting a solution containing L-ascorbic acid with an .alpha.-glucosyl saccharide in the presence of a saccharide-transferring enzyme capable of catalyzing the reaction between an .alpha.-D-glucosyl group on said .alpha.-D-glucosyl-L-ascorbic acid, and crystallizing said 2-O-.alpha.-D-glucosyl-L-ascorbic acid.
Dependencies are inferred from the claim text.