Ethyl Ascorbic Acid Usage Rate

Based on the product information for Ethyl Ascorbic Acid (3-O-ethyl ascorbic acid, Vitamin C Ethyl Ether), the recommended usage rate is 1-10%, with 3% being the suggested concentration for optimal results.

While the information does not explicitly state whether it can be used above 10-15%, it is generally recommended to follow the suggested usage rates provided by the manufacturer for best performance, stability, and safety in cosmetic formulations. Using concentrations higher than recommended may not necessarily increase efficacy and could potentially affect the stability or characteristics of the final product.