Etocas and Croduret (trade names) are vegetable-derived nonionic surfactants which find widespread use in agrochemicals as general emulsifiers and solubilisers. They are of particular value as biodegradable, sustainable alternatives to nonyl phenol ethoxylates. Etocas and Croduret , both   marketed by Croda,  are ethoxylated castor oil and ethoxylated hydrogenated castor oil respectively.

The emulsion characteristics judged were

1. Ease of dispersion of the surfactant/solvent mixture in water at 25ºC

2. The particle size of the resulting emulsion

Lower molar ethoxylates of castor oil are used as dispersing agents for oil based systems. They  are generally considered to present no special hazards. However, as with other nonionic surface active agents of this type, they may be irritating to the eyes as supplied.

More from here: http://www.chservice.ru/download/Etocas%20and%20Croduret.pdf