Adjusting pH for Vitamin C Serum Stability and Regulatory Compliance
Asked by: kalyaneechatree20
On: May 21, 2018
Product Type:
Cosmetics
Question
How should I adjust the pH of Stabilized Vitamin C (Natural-C Glycol) Serum for cosmetic production to meet the regulatory requirement of pH >= 3.5, ensuring the stability of Vitamin C (L-ascorbic acid)?
Answer
Adjusting pH for Stabilized Vitamin C (Natural-C Glycol) Serum
To adjust the pH of Stabilized Vitamin C (Natural-C Glycol) Serum for cosmetic production purposes, where the FDA requires a pH of at least 3.5, you should follow these steps:
- Gradually add a weak base, such as Triethanolamine 99%, to the serum.
- Continuously measure the pH as you add the base.
- Stop adding the base when the pH reaches 3.5.
It is important not to adjust the pH higher than 3.5, as a higher pH can cause Vitamin C (L-ascorbic acid) to degrade more quickly.
Related Products Mentioned
Vitamin C (L-ascorbic acid) (Ultra-Fine)
Cosmetics
Triethanolamine 99%
Cosmetics
