Function of Calcium Hydroxide in Hair Removal Formula (5:1 Ratio)

Regarding the formulation provided, the combination of Calcium Thioglycolate and Calcium Hydroxide is essential for effective hair removal.

• Calcium Thioglycolate is the primary active ingredient that breaks down the protein structure of hair.
• Calcium Hydroxide is a strong alkali used in conjunction with Calcium Thioglycolate. It helps create a high pH environment (as mentioned, the target pH is 12-12.5). This alkaline condition is crucial because it swells the hair shaft, allowing the Calcium Thioglycolate to penetrate more easily and react with the disulfide bonds in the hair keratin. Calcium Hydroxide also helps activate the thioglycolate.

The specific ratio (5:1 of Calcium Thioglycolate to Calcium Hydroxide) is important for several reasons:

• It contributes to achieving the optimal pH range required for the thioglycolate to be effective.
• It helps balance the reaction rate, ensuring efficient hair removal while managing the potential for skin irritation associated with high pH formulations.

Therefore, Calcium Hydroxide is not used only for pH adjustment but is a necessary component that works with Calcium Thioglycolate to enable the hair removal action at the required high alkalinity, with the ratio contributing to the overall performance and safety profile.