Aqua
Water
- Role
- The base of the formula and the solvent for the other ingredients.
- Catalog formulas
- 96
- Type
- Base
- Verified
- 06.11.2026
What does this ingredient do in an antiperspirant?
CosIng lists water (Aqua) with the function "solvent": salts, humectants and skin care ingredients dissolve in it.
Part of a system, not a label in isolation
In water-based roll-ons and gels, water usually comes first and dissolves the antiperspirant active. Water itself does not reduce sweating; anhydrous sticks and aerosols may contain none at all.
Aqua is not listed in the restrictive annexes of EU Regulation 1223/2009. Cosmetics use purified water; the safety assessment applies to the finished formula.
Water is not a source of irritation, but a water base affects how quickly the product dries and how the other ingredients feel on the skin.
Aqua is not the same as flower and herbal waters (for example Rose Flower Water or Anthemis Nobilis Flower Water): those are separate plant ingredients with their own INCI names.
Products containing Aqua
Links are based on the complete published INCI list for the exact product version.
Sources
The conclusions apply to the stated conditions and jurisdictions, not automatically to every concentration or product.
- EU CosIng: Aqua Supports: function, substance identity, restrictions
This ingredient is present in the OKEY formula
Verified product
See where it appears in the complete INCI list and compare the full formula across all criteria rather than judging a finished product by one ingredient.
View the OKEY product profile