Back to Ingredient Dictionary

SODIUM HYDROXYMETHYLGLYCINATE

Description

Sodium Hydroxymethylglycinate is a synthetic preservative and pH adjuster commonly used in skincare and personal care products. This water-soluble compound is derived from the amino acid glycine and formaldehyde, making it an effective antimicrobial agent that helps extend product shelf life. Its primary function is to inhibit the growth of bacteria, yeasts, and molds in cosmetic formulations.

With a pH range of 9.5 to 11.5, Sodium Hydroxymethylglycinate acts as an alkaline buffer, helping to maintain product stability. It is particularly useful in leave-on skincare products, such as lotions, creams, and serums, where it can be used at concentrations up to 0.5%. This ingredient is often chosen as an alternative to parabens and formaldehyde-releasing preservatives due to its broad-spectrum efficacy and relatively low irritation potential.

While generally considered safe for use in cosmetics, some individuals may experience sensitivity to this ingredient. It's important to note that Sodium Hydroxymethylglycinate can release small amounts of formaldehyde over time, which may be a concern for those with specific sensitivities or allergies. As with any skincare ingredient, patch testing is recommended before widespread use.