[chequere]

Thank you very much! I wonder if you could recommend any other ingredient or preservative that is considered natural and effective against gram-negative bacteria. Thank you very much!

[chequere]

5.0 or below. Thank you very much!

[chequere]

Thank you very much! Please forgive my ignorance, what percentage would 2500-3000 ppm equate to in a cosmetic formulation? Thank you!

[chequere]

Thank you very much! I have used Sodium Phytate on some of the products. The pH seems to drift down on all products (with and without sodium phytate). I will check the pH of the water.

I will also try to add a pH buffer solution with sodium citrate and citric acid. Should the pH on the pH buffer solution be in the target range that I want for the product? (e.g. if pH target range for a product is 4.8 - 5.3, what should the pH for the pH buffer solution be?). Thank you very much for your help!

[chequere]

Thank you! Sorry for not including more information. The Ph drifts down over time. None of the products that I have made include urea or gluconolactone. Thanks for your help!