丙二醇二壬酸酯為柔潤劑、增稠劑、黏度控製劑。該成分有致粉刺和致痘的可能性。該成分的致痘風險等級參考自Fulton， J. E. Comedogenicity and irritancy of commonly used ingredients in skin care products. J Soc Cosmet Chem 43， 321 - 333 (1989).