The purpose of this standard is to provide a volumetric method, after saponification, for the determination of esters in ethanol used as raw material for detergent formulations. The method is applicable to products whose ester content, expressed as ethyl acetate, is between 0.005 and 0.15% by weight. This standard must be applied in conjunction with UNE 55-811 "Surface agents. Ethanol used as raw material for detergent formulations. Test methods. Generalities."