1. Quaternium-73 is a mild, safe, and highly effective antimicrobial agent suitable for long-term use. It helps improve acne, fade acne marks, and provides preservative effects. It can be used both as an anti-acne active and a preservative in cosmetic formulations.

2. Formulation Recommendations:

(1) Quaternium-73 is slightly soluble in water; it is recommended to dissolve it in butylene glycol before adding to the formulation.

(2) Store away from light.

(3) Recommended pH range: 5.5–8.0.

(4) Suggested usage level: 0.001–0.005%.

(5) For non-emulsion systems, polyol content should be greater than 5%.

(6) The formulation system should have a certain level of viscosity.