Solution for Cloudy and Separating HEC Gel with Encapsulated Salicylic Acid

The cloudiness and separation you experienced when making a gel with Hydroxyethyl Cellulose (HEC) and Encapsulated Salicylic Acid, especially after adding TEA, are likely due to the mixing method and the addition of TEA.

Here's the recommended approach to create a clear and stable gel:

1. Prepare the HEC Gel Separately: Follow the method suggested by the staff. This involves dividing the water into two parts (hot and cold). Disperse the Hydroxyethyl Cellulose (HEC) powder in the hot water (around 70°C) while stirring continuously until it is fully dispersed and starts to thicken. Then, add the cold water while continuing to stir gently until a smooth, clear gel is formed. Avoid vigorous mixing that can introduce excessive air bubbles.

2. Avoid Adding TEA: The product description for Encapsulated Salicylic Acid indicates that it is compatible with HEC. Adding TEA (Triethanolamine) is not necessary for gelling HEC and can interfere with the stability of the formulation, leading to separation as you observed.

3. Gently Incorporate Encapsulated Salicylic Acid: Once the HEC gel is fully formed and clear, gently mix in the Encapsulated Salicylic Acid. Stir slowly to avoid damaging the capsules and minimize bubble formation. The product description mentions that using 6.6% of Encapsulated Salicylic Acid might cause small bubbles, which should dissipate over time.

By preparing the HEC gel correctly first and avoiding the addition of TEA, you should achieve a clearer and more stable gel when incorporating the Encapsulated Salicylic Acid.

Relevant products mentioned:

• Hydroxyethyl Cellulose (HEC) (4500mPa.s)
• Hydroxyethyl Cellulose (HEC) (2800mPa.s)
• Hydroxyethyl Cellulose (HEC) (2000mPa.s) (Super Clear Gel)
• Encapsulated Salicylic Acid (Liquid, Timed-Release, Wash-Off)