Cosmetics Formulation Development

Inquire about The Ordin formula*** Alpha Lipoic Acid 5%, this product says it has only 2 Ingredients. The character is Propanediol , Thioctic Acid (shows that they use Propanediol = 95%), so I want to ask if using serum with Propanediol 95% what will happen? because the website suggests that it should not be used. Propanediol over 20%, thanks for your reply in advance.

Hello Propanediol does not irritate the skin. Can be used up to 100%, but according to the information on the web page Which is stated at the highest 20% is the number provided by the manufacturer. which is a level suitable for general use Using more than 20% may cause severe skin discomfort. but from the nature of the formula as informed by the members The formula owner uses 95% for the reason that they want Propanediol completely dissolves ALA in the formulation. to achieve full efficiency