METHOD FOR PRESERVING AQUEOUS SOLUTION CONTAINING LEUCO CHROMOGEN

摘要

A method for preserving an aqueous solution containing a leuco chromagen is characterized in that at least one type selected from a group comprising polyoxyethylene alkylamine and polyoxyethylene alkenylamine is added to an aqueous solution containing the leuco chromagen. A method for stabilizing a leuco chromagen is characterized in that the leuco chromagen is made to coexist in an aqueous solution with at least one type selected from a group comprising polyoxyethylene alkylamine and polyoxyethylene alkenylamine. The present invention provides a method for preserving an aqueous solution containing a leuco chromagen and a method for stabilizing the leuco chromagen in which the leuco chromagen is stably preserved in the aqueous solution.