Abstract

AbstractEthoxylated fatty methyl esters (EFME) are nonionic surfactants obtained by direct insertion of ethylene oxide to fatty methyl esters in the presence of a composite metal oxide catalyst. Results of cumulative skin irritation testing of EFME on guinea pigs indicate that EFME are less irritating compared to ordinary alcohol ethoxylates (AE). Good skin compatibility of EFME is further illustrated by an in vitro hemolysis test and an in vitro cytotoxicity test. From the standpoint of environmental properties, EFME are readily biodegradable and are less toxic than AE. These results indicate the outstanding dermatological compatibility and good environmental compatibility of EFME.

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