Urenhederne O,O,O,O-tetramethyldithiodiphosphat (sulfotemp) og O,O,O-trimethyl-O-(3,5,6-trichlor-2-pyridinyl)diphosphordithioat (sulfotemp-ester) betragtes som et toksikologisk problem og må hver især højst udgøre 5 g/kg
The impurities O,O,O,O-tetramethyl dithiopyrophosphate (Sulfotemp) and OOO-trimethyl-O-(3,5,6-trichloro-2-pyridinyl) diphosphorodithioate (Sulfotemp - ester) were considered of toxicological concern and a maximum level of 5 g/Kg is established for each impurity.