[elham]

I think niacin amide has been converted to niacin?
How can it be identified in the product?

[elham]

The rest of the water formula, but the cause of itching and redness is only pH?

[elham]

Microformulation said:

I hardly doubt you would create Carbopol at the local level. You would be best served by simply purchasing this product.

your answer is right but i want study to synthesis this material

if you know book or site abouth cosmetics synthesis please say meand i am  PhD student in Chemistry

[elham]

Microformulation said:

If you post the Formulation with percentages, you will get better answers. I would guess it is likely an issue with the Niacinamide and you should research this issue closer. However, without percentages this is simply a guess.

glycerin  2%

tea tree oil 0.05%

niacinamide 0.5%

peg-7glycerl cocoate 2%

cocoamphoasetate 2.5%

preservative phenoxy ethanol 0.2%