What it is
Isoeicosane is a saturated branched-chain hydrocarbon with around twenty carbon atoms, manufactured synthetically. In formulas it acts as a light, dry-feeling emollient that improves spreadability and gives a smooth, non-tacky finish, which makes it useful in sunsticks and other anhydrous or silicone-based systems. Being a stable, inert oil it also helps disperse other ingredients and resists oxidation.
Safety & warnings
Inert, non-fragrant hydrocarbon oils such as isoeicosane have a low irritation profile and are not associated with notable sensitization. Branched hydrocarbons of this type are generally considered low on the comedogenicity scale, though very rich or occlusive blends may feel heavy on acne-prone skin.
Origin & sourcing
Synthetic; a branched aliphatic hydrocarbon produced through controlled chemical synthesis (commonly via oligomerization routes).
Questions everyone asks
What does isoeicosane feel like on skin?
It gives a light, smooth, dry-touch slip and is used to make products spread easily without greasiness.
Is isoeicosane natural?
No, it is a synthetic branched hydrocarbon.