Solubility and Formulation of Quaternium-73 in Clear Acne Cleanser

Solubility and Formulation of Quaternium-73

To answer your questions regarding the formulation of a clear acne cleanser using Quaternium-73, LipidSoft™ C1215, and Ultra Solve™:

1. Solubility of Quaternium-73 in LipidSoft™ C1215

Yes, Quaternium-73 is completely soluble in LipidSoft™ C1215 (C12-15 Alkyl Benzoate). Since Quaternium-73 is an oil-soluble powder and LipidSoft™ C1215 is a high-polar ester, it acts as an excellent solvent for this active ingredient.

• Tip: You should dissolve the Quaternium-73 powder in the LipidSoft™ C1215 first before adding it to the rest of the formula. Gentle stirring is usually sufficient; avoid excessive heat to maintain the stability of the active.

2. Solubilization with Ultra Solve™

The mixture of Quaternium-73 and LipidSoft™ C1215 can be successfully incorporated into a clear water-based cleanser using Ultra Solve™. Ultra Solve™ is a high-efficiency solubilizer specifically designed to bridge oils and esters into water systems to maintain clarity.

3. Recommended Ratios

For a clear cleanser for acne-prone skin, the following ratios are recommended as a starting point:

• Quaternium-73: 0.01% – 0.05% (This is a very potent ingredient; 0.01% is often sufficient for anti-acne efficacy).
• LipidSoft™ C1215: 1% – 2% (Used as the primary solvent for the powder).
• Ultra Solve™: 3% – 5% (The ratio of solubilizer to the oil/ester phase typically ranges from 2:1 to 3:1 to ensure a crystal-clear solution).

Suggested Mixing Procedure:

1. Mix Quaternium-73 into LipidSoft™ C1215 until completely dissolved.
2. Add Ultra Solve™ to the above mixture and stir until homogeneous.
3. Slowly add this "pre-mix" into your water/surfactant base while stirring.

Important Considerations for Acne-Prone Skin

• Light Sensitivity: Quaternium-73 is highly sensitive to light. Your final product must be packaged in an opaque or UV-protected bottle to prevent the active from degrading and the formula from changing color.
• Clarity: If the mixture appears cloudy after adding it to the water phase, slightly increase the amount of Ultra Solve™ until it turns clear.
• Efficacy: Quaternium-73 is excellent for acne-prone skin as it effectively targets P. acnes bacteria and helps reduce the appearance of post-acne marks by inhibiting melanin formation.