Formulation Issues: Salicylic Acid Solubility and AHA Cream Stability

Based on the feedback from the staff, here is a review of your proposed formulations:

Formula 1: Salicylic Acid Cream for Face

• Issue: The staff advises that Salicylic Acid (standard powder form, ID 148) will not dissolve completely with the amount of Butylene Glycol (5%) in your formula. High amounts of glycol are needed for this type of Salicylic Acid.
• Recommendation: The staff recommends using Salicylic Acid EZ (ID 766) instead, as it is water-soluble and easier to incorporate into water-based formulations like creams.

Formula 2: AHA Cream for Body

• Issue: The staff notes that Satin Cream Maker™ (ID 247) is not suitable for the acidic pH required for Glycolic Acid (ID 660) formulations. It will be difficult to create the desired texture.
• Recommendation: The staff recommends using acid-resistant thickeners or cream makers such as Pro Polymer (ID 234) or Butter Cream Maker (ID 1041). You should choose one of these alternatives.
• Additional Advice: Glycolic Acid can cause skin irritation, especially for new users. It is recommended to start with a lower concentration and gradually increase it as your skin builds tolerance.

In summary, while your proposed formulas are a good starting point based on the ingredients you have, adjustments are needed to ensure solubility and stability, particularly regarding the choice of Salicylic Acid type and the cream maker for the Glycolic Acid formula.