Solvent / vehicle ingredient
Ethylhexanediol
2-Ethyl-1,3-hexanediol, a branched glycol with both humectant and antimicrobial properties. Structurally related to 1,2-Hexanediol and Caprylyl Glycol, which are also used as preservative boosters. Used at low concentrations (typically 0.1–1%) to extend the spectrum and efficacy of primary preservation systems. Distinct from 1,2-Hexanediol (which is 1,2-substituted rather than 1,3-substituted) and 1-Hexanediol.
solventpreservative-boostingantimicrobial
Benefits
- ✓Effective preservative booster that enhances the efficacy of primary preservatives at low concentrations
- ✓Mild antimicrobial activity in its own right, particularly against gram-positive bacteria and some yeasts
- ✓Contributes solvent properties that improve the dissolution of fragrance ingredients and oil-phase components
Watch for
- ⚠At concentrations above 2%, skin sensitization potential has been noted in some patch-test studies — typically used well below this threshold
Compatibility
✓ Works well with
+ Phenoxyethanol+ Ethylhexylglycerin+ 1,2-Hexanediol
