Ingredient Compatibility, Reactions, and pH
คำถาม
I have a few questions regarding ingredient compatibility and pH:
1. Why can't Zinc PCA and Potassium Azeloyl Diglycinate be used together?
2. Will Niacinamide react with Salicylic Acid? I suspect that Niacinamide, which has an amide bond, might undergo hydrolysis when in water with acid as a catalyst, potentially turning into niacin. Is this correct? I saw a formula on your website.
3. Does Calendula Officinalis Extract have a specific pH range that should not be exceeded or fallen below? It is not mentioned on the website.
คำตอบ
Ingredient Compatibility and pH
Here is the information regarding the compatibility and pH levels of the ingredients you asked about:
Zinc PCA and Potassium Azeloyl Diglycinate: These two ingredients cannot be used together because they will cause precipitation.
Niacinamide and Salicylic Acid: A reaction can occur between Niacinamide and Salicylic Acid if the pH is too low. This can lead to the hydrolysis of Niacinamide into Niacin. To avoid this, it is recommended to adjust the pH of the formulation to be above 3, and ideally above 4.
Calendula Officinalis Extract: The suitable pH range for Calendula Officinalis Extract is 5-7.
ผลิตภัณฑ์ที่เกี่ยวข้องที่กล่าวถึง
Safe-B3™ (Vitamin B3, Niacinamide)
Calendula Extract (Water Soluble)
Salicylic Acid (BHA, Pharma Grade)
Azelaic Acid (Liquid Azelaic™, e.q. Azeloglicina)
