The ingredient, explained
1‚2-hexanediol
Human patch tests examined a preservative combination.
Ingredient guide
What it is and what it does
About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗
- Solvent
- Dissolves other ingredients in a formula.
Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗
Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.
A closer look
What the research shows
Human contact allergy research
No delayed type IV hypersensitivity was observed in the reported repeat-insult patch tests.
What this does not tell us
The tests used a two-ingredient preservative mixture and a finished formula. They do not isolate either ingredient or exclude all forms of irritation or allergy.
Sources for this summary. PubMed 19514921 ↗
Research review checked Oct 1, 2026
Bounded review of 0 local candidate records, selected relevant abstracts, and targeted exact-name primary-source searches. Not a systematic review.
Ingredient research is not proof that a product containing this ingredient works.
Read the 1 selected study
Human contact allergy research
Safety of a preservative system containing 1,2-hexanediol and caprylyl glycol. ↗
Cutaneous and ocular toxicology · 2009
Follow the formula
Products containing this ingredient
From the wider catalogue. Linked by the ingredient list, without an efficacy ranking.
Names and identifiers
- INCI name on ingredient lists
- 1‚2-HEXANEDIOL
- CAS registry number
- 6920-22-5
- EC number
- 230-029-6
Other recorded names (1)
- 1,2-Hexanediol
Sources for this ingredient record
- EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗ · ODbL 1.0 (Open Beauty Facts database) · Recorded Aug 8, 2026
- Official product ingredient declaration ↗ · Recorded Aug 15, 2026