White Precipitate in Cleansing Gel

The white precipitate observed in your facial cleansing gel formulation, especially when made without heat, is likely due to one or more ingredients not being fully soluble at room temperature. This is a common issue with certain surfactants, particularly at temperatures below their Krafft point or solubility limit in the specific formula.

Heating the gel may cause the precipitate to disappear as the solubility of the ingredient increases with temperature. However, it is possible that the precipitate will reappear when the gel cools down again.

The presence of a persistent precipitate indicates a potential stability issue with the formulation. While it might not necessarily render the product unusable, it can affect the clarity and overall appearance of the gel. It could also potentially impact the performance or feel of the product, as the ingredient causing the precipitate is not fully dispersed or dissolved.

To address this, you might need to adjust the formulation. This could involve:

• Using a different grade or type of the ingredient that has better solubility at lower temperatures.
• Adjusting the concentration of the problematic ingredient.
• Modifying other components in the formula (like salts or co-surfactants) that can influence the solubility of the ingredient.
• Ensuring the ingredient is properly dissolved during manufacturing, potentially by incorporating a heating step if suitable for all ingredients.

It's important to conduct stability testing on your final formulation to ensure it remains clear and free of precipitation under various temperature conditions over time.