He
1,2-Hexanediol
1,2-Hexanediol · 2-Hexanediol · HexanediolHydrator
A small solvent that holds a little water and spreads a formula — mostly there to back up the preservative system, quietly.
What it does
Its main job is backing up the preservatives: it makes a product harder for germs to grow in, so brands can use less preservative or a milder one.
Browse all 1238 ingredients — grouped by what they do, each with whatever evidence we can cite.
This page is public so a shared ingredient card always has its sources behind it — and so you can check them without an account.
Want more like this?
Every evidence-based flag cites its source, Drop tells you when your routine is complete, and it helps you simplify — instead of selling you more. The app launches on iOS and Android in October 2026. Rate my routine works today at /rate — no sign-in.