What it is
This ingredient is the diester of propylene glycol with capric (decanoic) acid, giving a light, low-viscosity emollient oil. It spreads readily, leaves a soft non-greasy finish, and helps dissolve and disperse organic UV filters in the oil phase. It is commonly found in Japanese sunscreen emulsions where a light sensory profile is prioritized.
Safety & warnings
Medium-chain glycol esters of this type are generally well tolerated with a low irritation profile and are not fragrance allergens. As a light ester it tends to have low comedogenic potential, though individual response can vary.
Origin & sourcing
Synthetic; produced by esterifying propylene glycol with capric acid, a medium-chain fatty acid.
Questions everyone asks
What does propylene glycol dicaprate do in sunscreen?
It is a light emollient and solvent that softens skin and helps dissolve and spread oil-soluble UV filters.
Does it leave a greasy feel?
It is a light, low-viscosity ester chosen to give a soft, non-greasy finish.