*According to Regulation CEE 648/04 "Ultimate aerobic biodegradation" means the level of biodegradation achieved when the surfactant is totally used by micro-organisms in the presence of oxygen resulting in its breakdown to carbon dioxide, water and mineral salts of any other elements present (mineralisation) [Reg. CEE 648/04 – Art. 2, 8]. Surfactants in detergents shall be considered as biodegradable if the level of biodegradability (mineralisation) measured...is at least 60 % within twenty-eight days (Reg. CEE 648/04 – Annex III).