Adding Encapsulated Salicylic Acid (Powder) to Gel

Based on the ingredient list you provided and the previous discussion, you can add Encapsulated Salicylic Acid (Powder, Timed-Release) to your existing gel formula.

Here are the answers to your questions and solutions to the issues you encountered:

1. Can it be added? Yes, Encapsulated Salicylic Acid (Powder, Timed-Release) is designed to be dispersed into gel or cream formulas.

2. Recommended Percentage: The recommended usage rate for Encapsulated Salicylic Acid (Powder, Timed-Release) is 0.5-4% of the total formula (which is equivalent to 0.25-2% active Salicylic Acid). The FDA regulation for Salicylic Acid in leave-on skin products is no more than 2.00% active Salicylic Acid, so the maximum usage rate for this powder form is 4%.

3. Mixing Method: This type of Encapsulated Salicylic Acid is a powder that disperses in the formula, it does not dissolve completely. You should add it in the final step of your formulation process. Blend or stir the mixture well to ensure the powder is evenly dispersed. The product description recommends blending for at least 15 minutes with a homogenizer or 30 minutes with a low-speed blender to ensure complete dispersion and prevent settling. Avoid heating the mixture above 40°C as this can damage the encapsulation.

Regarding the issues you faced:

• Powder not dissolving / seeing particles: This is normal for Encapsulated Salicylic Acid (Powder, Timed-Release). It is designed to be dispersed as small particles, not dissolved into a clear solution. The particles gradually release the active ingredient over time.
• Gel becoming liquid: Adding Encapsulated Salicylic Acid (Powder, Timed-Release) can sometimes reduce the viscosity of a formula. To restore the gel texture, you can add a thickener.

Recommendation for Thickener:

As suggested previously, you can use Satin Cream Maker at a concentration of 1-2% to help thicken the gel back to your desired consistency. Satin Cream Maker is an emulsifier and thickener that is easy to use and compatible with many ingredients. It can be mixed into the water phase.

After adding Satin Cream Maker and achieving the desired texture, then add and disperse the Encapsulated Salicylic Acid (Powder, Timed-Release) as described in the mixing method above. This should help the powder disperse better within the thickened base.