... & R. H. Smith, "Rodent Pests and their Control", CABI (1994). Formulation types AB; BB; RB. Selected tradenames: 'Havoc' (Syngenta); 'Klerat' (Syngenta ... /kg diet daily. Toxicity class WHO (a.i.) Ia; EPA (formulation) I EC hazard T+; R27/28| T; R48/24/25 ... LC50 (48 h) 0.34 mg a.i./l (as formulation). ENVIRONMENTAL FATE EHC 175 (WHO, 1995). Animals In mammals, a ...