At a glance
- CAS number
- 1117-86-8
- INCI name
- Caprylyl Glycol
- Function
- preservative, humectant, emollient, antimicrobial booster
- Typical use level
- 0.3%–1.5%
- Solubility
- both
- Stable pH
- 3–8
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
1,2-Octanediol Octylene Glycol 2-Methyl-1,3-propanediol Symclariol
Compatibility
Works well with:
Phenoxyethanol Ethylhexylglycerin Glycerin Niacinamide Hyaluronic Acid Hexylene Glycol
Caprylyl Glycol is frequently combined with Phenoxyethanol and/or Ethylhexylglycerin to create broad-spectrum preservation systems with a strong synergistic effect, allowing lower use levels of each component. It is generally compatible across a wide range of cosmetic ingredients and formulation types. No significant incompatibilities are well-documented, though performance should be validated in high-surfactant systems where antimicrobial efficacy may be reduced.
Formulation notes
Caprylyl Glycol (1,2-octanediol) is a multifunctional diol that provides antimicrobial activity primarily against gram-positive bacteria and some fungi, making it a popular preservative booster or co-preservative rather than a stand-alone preservative. It also contributes mild skin-conditioning and emollient properties, improving skin feel in formulations. It is considered a mild, well-tolerated ingredient and is frequently featured in 'free-from' preservative marketing when used without traditional preservatives, though its antimicrobial function should still be substantiated with challenge testing.
Related ingredients
- Butylene GlycolHumectant
- PanthenolHumectant
- Pentylene GlycolHumectant
- Propylene GlycolHumectant
- UreaHumectant
- Benzyl AlcoholPreservative