Caprylate is the international term for salts/esters of caprylic acid (octanoic acid). The INCI designation "Caprate" (German: Caprinate) describes the esters of capric acid.
Methyl glucose sesquicaprylate/sesquicaprate is an esterification product of caprylic acid/capric acid. Methyl glucose sesquicaprylate/sesquicaprate is used in cosmetic formulations. The substance acts as emollient (makes the skin smooth and supple), emulsifier (changes the interfacial tension of liquids like water and oil so that they can be mixed together) and skin care product.