1,2-Hexanediol is a light, water-soluble glycol. It helps dissolve other ingredients, draws a little moisture into the skin and helps keep products free of germs.
- Also known as
- Hexanediol, Hexylene glycol (sometimes confused, but a different ingredient)
- Pregnancy
- Generally considered fine in pregnancyIt is generally considered fine in skincare during pregnancy, but ask your doctor if you have any concerns.
- Evidence
- Some good studies
What it does
1,2-Hexanediol belongs to the glycol family, the same group as propylene glycol and butylene glycol. In a product it helps other ingredients mix and spread evenly. It also attracts water, so it adds a small amount of hydration. It has mild antimicrobial activity, so brands often use it with or instead of traditional preservatives. This is why it often appears in products labelled 'preservative-free'. Although its name ends in '-diol', it is not a drying alcohol like alcohol denat.
Good for
- All skin types
- Oily and combination skin
- Light, water-based formulas suited to humid weather
- Sensitive skin that reacts to some traditional preservatives
- Products marketed as preservative-free
How to use it
You do not need to do anything special. It is a base ingredient and is usually present at low levels, often a few percent or less. It appears in cleansers, toners, serums, moisturisers, sunscreens and make-up. It can be used morning and evening.
Who should be careful
It is generally well tolerated. A small number of people have had allergic skin reactions to it, so if you have known reactions to glycols, check labels. At higher levels it may sting broken or very sensitive skin. If a product causes redness or itching, stop using it, as ongoing irritation can lead to dark marks on skin that darkens easily.
Pairs well with
Caprylyl glycol, Ethylhexylglycerin, Phenoxyethanol, Glycerin, Hyaluronic acid, Niacinamide.
