Issues with Witch Hazel Powder Dissolution and Compatibility with Encapsulated BHA

Asked by: apisit-2014 On: October 10, 2014 Product Type: Cosmetics

Question

Questions regarding Witch Hazel (Extract 99% Tannins) Powder

I am encountering two issues when working with Witch Hazel (Extract 99% Tannins) powder in my formulation:

  1. Dissolution Difficulty: The powder is difficult to dissolve and tends to clump together.
  2. Precipitation: When mixed with Encapsulated Salicylic Acid (BHA), precipitation occurs in the formula.

Could you please explain the reasons behind these issues and provide solutions or alternative ingredient suggestions?

Answer

Issues with Witch Hazel (Extract 99% Tannins) Powder Dissolution and Precipitation

Based on the properties of Witch Hazel (Extract 99% Tannins) powder and its interaction with other ingredients, there are two main issues you encountered:

Issue 1: Difficulty Dissolving and Clumping

Explanation: The high concentration of Tannin in Witch Hazel (Extract 99% Tannins) powder makes it highly water-soluble. When the powder is added to a large volume of water or still water, it rapidly absorbs water and the particles stick together, forming sticky clumps. This phenomenon is known as "clumping".

Solutions: To properly dissolve the powder and prevent clumping, you need to ensure the powder particles are dispersed quickly as they contact the water. Here are a few methods:

  • Vigorous Stirring: Gradually sprinkle the powder into water that is being stirred vigorously (e.g., using a magnetic stirrer or creating a strong vortex with a mixing rod). This helps the powder disperse and dissolve immediately upon contact with the water.
  • Pre-mixing: Dissolve the powder in a very small amount of water first to create a concentrated paste or solution, then add this mixture to the main water phase while stirring.
  • Shaking: If using a container with a lid, you can add the powder and water and shake vigorously until dissolved.

Issue 2: Precipitation when mixed with Encapsulated BHA

Explanation: Encapsulated Salicylic Acid (BHA) is designed with a special encapsulated structure (liposome) and often carries a specific charge to help with skin delivery. Certain ingredients, including the high concentration of tannins in Witch Hazel (Extract 99% Tannins) powder, can interfere with this delicate encapsulation structure. This interference can cause the encapsulated BHA to break down or become unstable, leading to separation or precipitation in the formula.

Solution: Witch Hazel (Extract 99% Tannins) powder is incompatible with Encapsulated Salicylic Acid. If you need to include Witch Hazel in a formula that contains Encapsulated Salicylic Acid, it is recommended to use Witch Hazel (Distillate - Alcohol Free, Paraben Free) instead. The distilled form is generally more compatible with a wider range of ingredients, including encapsulated actives, and is less likely to cause precipitation issues while still providing some of the benefits of Witch Hazel.