Propylene glycol (1,2-propanediol)" refers to a divalent alcohol which, due to its chemical and physical properties, is widely used in pharmaceuticals, cosmetics and technology both as a mono-substance and as a component of an ester, "capraote" refers to salt/ester of caproic acid (hexanoic acid).
Propylene glycol dicaproate is used in cosmetic formulations. The substance acts as an emollient (makes the skin smooth and supple).