Different Jobs Not Different Brands of the Same Job
Phenoxyethanol is a broad-spectrum preservative effective against bacteria, yeast and mould. 1,2-Hexanediol is primarily a humectant that also functions as a mild preservative or booster and as a solvent. Treating them as interchangeable is the most common specification error we see.
Dosage Ceilings Work in Opposite Directions
Phenoxyethanol has a hard regulatory ceiling of 1.0 percent. 1,2-Hexanediol has a practical optimum of 0.5 to 5 percent, and is effective as a mild preservative at around 5 percent. One is limited by regulation, the other by skin tolerance and cost.
Skin Feel Is a Real Differentiator
1,2-Hexanediol hydrates with a non-sticky feel, which is why it appears in serums and essences where a heavier humectant load would be rejected on the sensory panel.
Label Claims Diverge
1,2-Hexanediol paired with p-hydroxyacetophenone is the common route to a preservative-free claim. Phenoxyethanol is declared as a preservative, so a clean-label range usually starts from the other ingredient.
Many Formulations Use Both
Using 1,2-hexanediol as a humectant and mild booster alongside phenoxyethanol lets the phenoxyethanol level drop while total preservation holds. The two are complements more often than alternatives.
Every figure quoted here comes from the documentation of the products we supply. Confirm each limit against the regulation in force in your destination market before it enters a specification.
