Step 1: Water/Aqua/Eau ●
TL;DR. This ingredient is the primary solvent and diluent in many beauty and personal care formulas. It forms the continuous phase for lotions, gels, cleansers, toners, and serums, helping dissolve or disperse humectants, salts, surfactants, polymers, and extracts.
What does Step 1: Water/Aqua/Eau do in a cosmetic formula?
This ingredient is the primary solvent and diluent in many beauty and personal care formulas. It forms the continuous phase for lotions, gels, cleansers, toners, and serums, helping dissolve or disperse humectants, salts, surfactants, polymers, and extracts.
Is Step 1: Water/Aqua/Eau clean?
This ingredient is broadly accepted across clean-beauty frameworks and is generally well tolerated on skin. The main quality question is purification and microbiological control, since high-use formulas require an effective preservation system.
Is Step 1: Water/Aqua/Eau sustainable?
This material is widely available and has no bioaccumulation concern, but responsible use depends on local resource management, purification energy, and manufacturing practices. In finished products, its environmental profile is usually driven more by the full formula, packaging, and production footprint than by the ingredient itself.
Is Step 1: Water/Aqua/Eau COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic formulations, though it does not count toward organic content. From a Green Chemistry perspective, it is a preferred solvent because it is nonflammable, low residue, and compatible with low-temperature processing in many formulas.
How does Step 1: Water/Aqua/Eau work chemically?
The molecule is small, highly polar, and hydrogen-bonding, giving it strong solvency for electrolytes, glycols, humectants, and many extract constituents. It is commonly the largest phase in emulsions and gels, often 50 to 90% of a formula, and it sets the pH context, preservative demand, and compatibility for polymers, salts, surfactants, and emulsifiers.
Last updated 2026-05-16