At a glance
- CAS number
- 96702-03-3
- INCI name
- Ectoine
- Function
- humectant, skin-protective, anti-inflammatory, barrier repair
- Typical use level
- 0.1%–2%
- Solubility
- water
- Stable pH
- 4–8
CAS number and synonyms are sourced from PubChem. Function, usage levels, pH and compatibility are AI-assisted formulation guidance — verify against your supplier's technical data sheet and applicable regulations before use.
Also known as
1,4,5,6-Tetrahydro-2-methyl-4-pyrimidinecarboxylic acid Tetrahydromethylpyrimidine carboxylic acid THM carboxylic acid Aminoectoine
Compatibility
Works well with:
Hyaluronic Acid Niacinamide Panthenol Ceramides Allantoin Glycerin
Ectoine is broadly compatible with most cosmetic actives and is stable across a wide pH range, making it easy to incorporate into aqueous phases. It works synergistically with other skin-barrier and moisturizing ingredients such as hyaluronic acid and ceramides. No significant incompatibilities with common cosmetic ingredients have been widely documented.
Formulation notes
Ectoine is a naturally occurring extremolyte produced by halophilic microorganisms to protect against osmotic stress, UV radiation, and desiccation. In cosmetics, it stabilizes cellular membranes, proteins, and DNA, reducing inflammation and reinforcing the skin barrier — making it especially valued in sensitive-skin, anti-pollution, and sun-aftercare formulations. It is generally considered very well tolerated with a favorable safety profile.
Related ingredients
- Ceramide NPActive
- Glycolic AcidActive
- Tranexamic AcidActive
- Butylene GlycolHumectant
- Caprylyl GlycolPreservative
- Hydroxypropyl MethylcelluloseThickener