Preservatives for Glycerin Soap and Serum (Paraben and Formaldehyde-Free)

Here are some preservative options suitable for glycerin soap and serum, avoiding parabens and formaldehyde:

For Glycerin Soap

For glycerin soap, the pH of your formulation is a key factor.

• If the pH is not higher than 9, you can use Phenoxyethanol.
• If the pH is higher than 9, you should consider using Mild Preserved.

For Serum

For a serum with a pH around 6, you have several suitable options:

• Phenoxyethanol is a safe and effective choice.
• For a natural alternative, you can consider NaturePreserve Ultra.
• Mild Preserved is also suitable for serum formulations with a pH in this range (2-8).

Using Mild Preserved in Serum (pH ~6)

Regarding your questions about using Mild Preserved in a serum with a pH of approximately 6:

1. Yes, you can use Mild Preserved in a serum with a pH of around 6.
2. For FDA registration (อย.), you should use the INCI names Caprylyl Glycol and Ethylhexylglycerin. Do not use the trade name "Mild Preserved".
3. To get the specific ratio between Caprylyl Glycol and Ethylhexylglycerin in Mild Preserved, please contact customer service at care@myskinrecipes.com to request the analysis document.

Using Pro Polymer as a Serum Base

Regarding your questions about using Pro Polymer as a base for a serum:

1. Yes, you can use Pro Polymer as a gel base for a serum formulation.
2. For FDA registration (อย.), you should use the INCI name ACRYLATES/C10-30 ALKYL ACRYLATE CROSSPOLYMER. Do not use the trade name "Pro Polymer".