Butylene glycol dicaprylate/dicaprate is an oily chemical compound composed of butylene glycol and caprylic and capric acids.

What it is used for and where
Butylene glycol is an oil obtained from an amine-treated catalyst or acetaldehyde dehydrogenation process and its chemical structure is very similar to propylene glycol. It is used as a humectant in tobacco, cellophane, as a solvent in injectables, and is also the most widely used glycol in the formulation of paints. It is a good vitrifying agent and a good solvent that can remove heavy hydrocarbon deposits.

Cosmetics
Skin conditioning agent. It is the mainstay of topical skin treatment by restoring, increasing or improving skin tolerance to external factors, including melanocyte tolerance. The most important function of the conditioning agent is to prevent skin dehydration, but the subject is rather complex and involves emollients and humectants.

Skin conditioning agent - Emollient. Emollients have the characteristic of enhancing the skin barrier through a source of exogenous lipids that adhere to the skin, improving barrier properties by filling gaps in intercorneocyte clusters to improve hydration while protecting against inflammation. In practice, they have the ability to create a barrier that prevents transepidermal water loss. Emollients are described as degreasing or refreshing additives that improve the lipid content of the upper layers of the skin by preventing degreasing and drying of the skin. The problem with emollients is that many have a strong lipophilic character and are identified as occlusive ingredients; they are oily and fatty materials that remain on the skin surface and reduce transepidermal water loss. In cosmetics, emollients and moisturisers are often considered synonymous with humectants and occlusives.
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