Disodium EDTA Usage Concentration

Based on the product information for Disodium EDTA, the recommended usage rate is typically 0.1-0.2%.

Adding Disodium EDTA at a concentration of 5% is significantly higher than the recommended level for cosmetic formulations.

Using a formulation with such a high concentration of Disodium EDTA is not suitable for skin application and can potentially cause adverse effects. It is strongly advised not to use the essence you have mixed.

While there isn't a single "maximum acceptable percentage" that applies universally, exceeding the recommended range (0.1-0.2%) substantially increases the risk of irritation or other skin reactions.