Cloudiness and Sediment in Liquid Formulation
Question
I mixed Polyglyceryl-4 Caprate (3%), Dipropylene glycol (12%), Preserve-Free PHL (0.9%), and water by shaking, but the mixture became cloudy and developed white sediment. Which ingredient is causing this issue?
Answer
Formulation Issue Analysis
Based on your formulation and the problem described (cloudiness and white sediment), the ingredient most likely causing the issue is Preserve-Free PHL.
The product description for Preserve-Free PHL indicates that it requires thorough blending in water for approximately 5 minutes to dissolve completely and become clear. Simple shaking may not be sufficient to fully incorporate this ingredient, leading to undissolved particles appearing as sediment and causing the mixture to be cloudy.
- Polyglyceryl-4 Caprate and Dipropylene glycol are both readily soluble or miscible in water and are less likely to cause this type of precipitation.
Recommendation:
Ensure that the Preserve-Free PHL is fully dissolved in the water phase by blending thoroughly for several minutes before proceeding with the rest of the formulation steps. This should help achieve a clear solution without sediment.
Updated Review: May 2026
This section was added after reviewing the original answer against current product availability and formulation knowledge at the stated point in time.
As of May 17, 2026, the product specifications for Preserve-Free PHL™ confirm that achieving a clear solution requires thorough mechanical mixing. The official handling instruction states: "Mix everything together and use magnetic stirring for 15 minutes to make it homogeneous." This reinforces the original recommendation to blend for an extended period rather than simply shaking.
Polyglyceryl-4 Caprate and Dipropylene glycol remain fully compatible with water-based systems and are not contributors to the cloudiness or sediment.
