Coconut Alkanes
Explained
This is a lightweight, plant-derived emollient and solvent made from the fatty acids of coconut oil.
It spreads easily and adds a soft, silky, non-greasy slip, then evaporates rather than sinking into skin. Due to this behavior, it's prized as a natural and renewable replacement for silicones.
Typical use concentrations can go anywhere up to 20%.
The CIR Expert Panel has reviewed coconut oil and its hydrogenated derivatives and found them to be safe as used in cosmetics. It's a low-irritating and well-tolerated ingredient with no notable sensitization concerns.
Because it's a pure saturated hydrocarbon and not a free fatty acid or ester in the C11-24 range that Malassezia can feed on, it doesn't provide the lipids for Malassezia to feed on. This ingredient is generally regarded as safe for fungal acne.
Acne
There's no comedogenicity data for this specific ingredient; the "coconut clogs pores" reputation comes from coconut oil which scored high on the old rabbit ear assay.
That method tested pure ingredients on rabbit ears and later work showed the results translate inconsistently to human skin.
Some people still find it breaks them out. So if that's you, definitely trust your skin.
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