Comparing Ethylhexylglycerin and Mild Preserved Eco for Preservation

Based on the product information, here's a comparison of Ethylhexylglycerin alone versus Mild Preserved Eco (which is a blend of Ethylhexylglycerin and 1,3 Propanediol) in terms of preservation effectiveness and stability:

• Ethylhexylglycerin (Pure): This ingredient is described as a gentle preservative and humectant. However, it is explicitly stated that it is not suitable for use as a single preservative in a formula and should be used together with other preservatives to achieve broad-spectrum protection against microorganisms. It is stable over a wide pH range (2-12) and can withstand high temperatures (up to 120°C).

• Mild Preserved Eco: This product is a blend designed to provide preservation. While not classified as a preservative by the FDA, it functions to inhibit microbial growth in cosmetic formulas. It is presented as a more ready-to-use option compared to pure Ethylhexylglycerin, suggesting it offers more comprehensive protection on its own. It is effective in a pH range of 4-9 and can withstand heat up to 80°C for a short period (up to 5 minutes).

Conclusion:

Mild Preserved Eco is likely to provide more comprehensive and stable preservation when used alone in a formula compared to pure Ethylhexylglycerin. Pure Ethylhexylglycerin requires combination with other preservatives to be effective against a broad range of microorganisms. Mild Preserved Eco, being a blend, is formulated to offer more complete protection as a single ingredient, within its recommended usage rate, pH range, and temperature limitations.

Always perform challenge testing on your final formulation to confirm the effectiveness and stability of the chosen preservative system.