Based on the available formulation references, the recommended dosage of EDTA.Na4 (Tetrasodium EDTA) in hand sanitizers or similar hand-cleaning products is typically between 0.1% and 0.2% by weight of the total formulation.
Here are the specific examples found in formulations:
Product Type EDTA-Na4 Dosage Other Key Components Source
Mild Antibacterial Hand Cleanser 0.10% Sodium Lauryl Sulfate, Chlorhexidine Formulation from Surfactant.com.cn
Hand Antibacterial Liquid 0.20% Chlorhexidine Gluconate, Coconut Extract, HPMC Chinese Patent Application (CN113648246A)
📝 Interpretation and Recommendations
Function: In these formulas, EDTA.Na4 acts as a chelating agent. Its primary role is to bind metal ions (like calcium and magnesium) in the water, which prevents them from interfering with the cleaning action of the surfactants and ensures the preservatives (like chlorhexidine) remain stable and effective .
Usage Context: This low dosage (0.1-0.2%) is sufficient for its purpose. The 0.10% example is part of a more complex surfactant system , while the 0.20% example is in a simpler formula focused on chlorhexidine and natural extracts .
General Guideline: While these two data points provide a solid reference range, the exact optimal dosage for your specific product may vary slightly depending on the hardness of the water used in the formula and the overall compatibility with other ingredients. It is always best to perform stability tests with your complete formulation.
Shandong Kairui Chemistry Co.,Ltd. is EDTA.Na4 Manufacturer.