Cosmetics Products Analysis

Ask how to use it. 1. I see some brands wear. Propanediol or Butylene Glycol is the main base without น้ำกลั่น as a solvent. with Vitamin C Butylene Glycol this be done in practice ? Butylene Glycol and Propanediol In a very high %, will it increase the efficiency of absorption?

Hello Butylene Glycol dissolve ascorbic acid up to about 5% at room temperature. Propanediol don't have any data, I have to test, but the solubility is not much. and less than water