| abstract |
A stable aqueous preparation containing EPC-K is provided. Furthermore, a method for stabilizing an aqueous preparation containing EPC-K is provided. The aqueous preparation contains (a) L-ascorbic acid dl-α-tocopherol phosphoric acid diester potassium salt and (b) at least one selected from the group consisting of a polyoxyethylene alkylphenyl ether, a polyoxyethylene alkyl ether, and a polyoxyethylene fatty acid ester. The method for stabilizing an aqueous preparation includes a step of preparing an aqueous preparation containing (a) L-ascorbic acid dl-α-tocopherol phosphoric acid diester potassium salt and (b) at least one selected from the group consisting of a polyoxyethylene alkylphenyl ether, a polyoxyethylene alkyl ether, and a polyoxyethylene fatty acid ester. |