By Adolph Kuehn
Senior Research Chemist, Process and Product Research
Surface Chemistry Americas

Alkyl ether citrates are novel anionic surfactants produced by AkzoNobel Surface Chemistry. As illustrated below, these products are a mixture of mono- and di-esters of citric acid.

In general, alkyl ether citrates are prepared from the esterification of citric acid with alkoxylated hydroxyl compounds, especially with ethoxylated fatty alcohols. As compared with other anionic surfactants, they are much milder and more biodegradable, and possess lower aquatic toxicity. Their low eye and skin irritation make them ideal surfactants for cleaning and care applications, where they may find use in oil in water emulsions, hair care formulations, and as emulsifiers for oily soils. In addition, alkyl ether citrates have been used for skin protection, in pharmaceutical preparations, and as fragrance compatibilizers.

AkzoNobel Surface Chemistry is a world leader in alkoxylation and esterification technologies. Alkyl ether citrates with varied hydrophobe, degree of alkoxylation, alkoxylation distribution, and monoester/diester ratio can be designed and practically produced to satisfy our customers’ specific needs. Let us provide you the technical support to explore the many possibilities. Please contact your local AkzoNobel Surface Chemistry account manager, or visit us at the locations listed in this electronic publication.