Cosmetics Formulation Development

Ask about substances that can be used as a preservative booster of Phenoxyethanol is necessary. 1,2-Hexanediol Only one or can use another substance instead. You can use Propanediol instead, and how many % should I use?

Hello from the test results 1,2-Hexanediol do The function is better than other options. 1-2% recommended.