Aqua/Water/Eau ●
TL;DR. This ingredient is the primary solvent and diluent in many beauty and personal care formulas, creating the continuous phase that dissolves salts, humectants, preservatives, and many actives. It also sets product texture, spread, and concentration.
What does Aqua/Water/Eau do in a cosmetic formula?
This ingredient is the primary solvent and diluent in many beauty and personal care formulas, creating the continuous phase that dissolves salts, humectants, preservatives, and many actives. It also sets product texture, spread, and concentration.
Is Aqua/Water/Eau clean?
From a clean-beauty perspective, it is broadly accepted and not a restricted-list concern. The main quality issue is purity, since formulas need appropriate microbial control and low levels of dissolved minerals or contaminants.
Is Aqua/Water/Eau sustainable?
Its footprint is usually tied to sourcing, purification, heating, cooling, and manufacturing use rather than persistence. It has low environmental persistence concerns, but responsible production still means efficient use and proper effluent management.
Is Aqua/Water/Eau COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic standards, although it does not contribute to organic percentage calculations. It aligns well with Green Chemistry as a benign solvent, especially when purification and processing are energy-efficient.
How does Aqua/Water/Eau work chemically?
The molecule is small and highly polar, with two hydrogen atoms bonded to one oxygen atom, giving it strong hydrogen-bonding behavior and broad solvent utility. It is commonly used at roughly 30 to 95% in emulsions, gels, cleansers, and mists, is stable across normal cosmetic pH ranges, and requires preservation in finished formulas that can support microbial growth.
Last updated 2026-05-13