BACTERICIDAL/PRESERVATIVE AGENT

摘要

The object is to provide a bactericidal/preservative agent whose bactericidal/preservative ingredient is hardly degraded even when exposed to an environmental light such as an artificial light and natural light, and also provide use of the bactericidal/preservative agent. Provided is a bactericidal/preservative agent comprising a specific cyanin dye as a bactericidal/preservative ingredient and rutin or a sugar derivative thereof as an ingredient for improving the light resistance of the cyanin dye. Also provided is an agent for external application to the skin, which comprises the bactericidal/preservative agent.