1996, 1997), and the main metabolite of p-DCB is 2,5-DCP, which is excreted both as the free substance and in conjugated forms (as sulfate or glucuronide) in the urine (Azouz et al. 1955; Kimura et al. 1979; Hawkins et al. 1980; Klos and Dekant 1994; Hissink et al. 1997; Bomhard et al. 1998) and to some extent in the feces (Kimura et al.