At a glance
- CAS number
- 122-99-6
- INCI name
- Phenoxyethanol
- Function
- preservative, solvent
- Typical use level
- 0.5%–1%
- Solubility
- both
- Stable pH
- 3–10
CAS number and synonyms are sourced from PubChem. Function, usage levels, pH and compatibility are AI-assisted formulation guidance — verify against your supplier's technical data sheet and applicable regulations before use.
Also known as
Phenoxyethanol Ethylene glycol monophenyl ether Phenyl cellosolve Phenoxethol Phenoxytol Ethanol, 2-phenoxy- 2-Phenoxyethan-1-Ol Phenoxetol Ethylene glycol phenyl ether Rose ether Phenoxyethyl alcohol 1-Hydroxy-2-phenoxyethane
Compatibility
Works well with:
Ethylhexylglycerin Caprylyl Glycol Glycerin Niacinamide Hyaluronic Acid Carbomer Xanthan Gum Cetearyl Alcohol Dimethicone Tocopherol
Use caution with:
Polyols at high concentration Nonionic surfactants at high HLB
High concentrations of nonionic surfactants or polyols can reduce preservative efficacy by micellar entrapment or partitioning, effectively lowering free phenoxyethanol activity in the aqueous phase. It is commonly paired with ethylhexylglycerin or caprylyl glycol as a booster to achieve broad-spectrum efficacy at lower use levels. Generally stable and compatible across a wide range of cosmetic formulations.
Formulation notes
EU Cosmetics Regulation limits phenoxyethanol to 1.0% in all cosmetic products; as of 2022, the EU SCCS advises caution in products for children under 3 and leave-on products applied to the nappy area. Mildly irritating at higher concentrations; use at the lowest effective level.
Frequently asked questions
What is Phenoxyethanol?
Phenoxyethanol is a preservative, solvent used in cosmetic and personal-care formulation. Typical use level is 0.5%–1%. It is both-soluble. Stable in the pH 3–10 range.
What is Phenoxyethanol used for?
Phenoxyethanol is used as preservative, solvent in cosmetic and personal-care formulations.
What is the typical use level of Phenoxyethanol?
Phenoxyethanol is typically used at 0.5%–1% in the finished formulation. Always confirm against your supplier's technical data sheet.
What is the CAS number of Phenoxyethanol?
The CAS registry number for Phenoxyethanol is 122-99-6. Its INCI name is Phenoxyethanol.
At what pH is Phenoxyethanol stable?
Phenoxyethanol is generally stable in the pH 3–10 range.
What ingredients are compatible with Phenoxyethanol?
Phenoxyethanol works well with Ethylhexylglycerin, Caprylyl Glycol, Glycerin, Niacinamide, Hyaluronic Acid, Carbomer, Xanthan Gum, Cetearyl Alcohol, Dimethicone, Tocopherol. Use caution when combining it with Polyols at high concentration, Nonionic surfactants at high HLB.
Related ingredients
- Benzyl AlcoholPreservative
- UreaHumectant
- ChlorphenesinPreservative
- Dehydroacetic AcidPreservative
- HydroxyacetophenonePreservative
- Piroctone OlaminePreservative