Silicone Gel Base Composition and Anhydrous Vitamin C Formulation Issues
Asked by: hydronium_ion3
On: May 14, 2013
Product Type:
Cosmetics
Question
Regarding silicone gel base composition and formulating an anhydrous Vitamin C product:
- Does the silicone gel base contain only Cyclopentasiloxane and Dimethicone, or does it also include Dimethicone/Vinyl Dimethicone Crosspolymer?
- To create an anhydrous Vitamin C formula, is it necessary to use the store's silicone gel base (as it is currently out of stock)?
Is the following proposed formula suitable for an anhydrous Vitamin C product?
Propylene glycol 35% Dimethylcone 35% Cyclopentasiloxane 10% Vitamin C 15% Glycerine 5%
Answer
Based on your questions and the staff's reply:
- Regarding the ingredients of the silicone gel base: The staff confirmed that it must contain Dimethicone/Vinyl Dimethicone Crosspolymer in addition to Cyclopentasiloxane and Dimethicone.
- Regarding the anhydrous Vitamin C formula and the need for the store's base: The staff mentioned that using just the silicone base is not sufficient. You would also need Isododecane, which acts as a solvent that can dissolve in silicones. (The staff noted these ingredients were expected to be available from 24/6/2013).
- Regarding your proposed formula: The staff advised that this formula is not suitable because:
- Propylene Glycol cannot dissolve in Silicone.
- The formula lacks a gelling agent.
This aligns with the information provided by the staff.