Aqua
INCI: AQUA
CAS 7732-18-5 EC 231-791-2
Water. The most common cosmetic ingredient, used as a solvent to dissolve other ingredients. Listed first on most INCI labels as it is typically the primary ingredient by concentration.
Limited Data
Insufficient safety data available. Consider enriching this ingredient.
Details
Description
Water. The most common cosmetic ingredient, used as a solvent to dissolve other ingredients. Listed first on most INCI labels as it is typically the primary ingredient by concentration.
Purpose
Function
Solvent, continuous phase carrier in O/W emulsions
Profile
Properties
Silicone
Silicone free
Compliance
Regulatory Status
EU
Permitted
Safety
EXCELLENT
US
Permitted
Absorptionnegligible
Sensitizationnone
MoSadequate
NOAEL1000 mg/kg
ConcernNone
Flags
microbiological-control-requiredeu_children_restrictedepa_safer_alternativeifra_fragrance
Verdict
Inherently safe cosmetic solvent with zero chemical toxicity concern. Risk management focus is on microbiological quality: ≤100 CFU/mL per ISO 17516, absence of Pseudomonas aeruginosa, E. coli, coliforms, and enterococci. Continuous monitoring per ISO 22716 GMP required; biofilm prevention essential in distribution systems.
US Note
No FDA restriction. Labeled as WATER in US. VCRP universal acceptance.
Assessment
Ratings
Reference