Daniel & Gage (1966) studied the absorption of 14C-diquat dibromide and 14C-diquat dichloride following oral and subcutaneous single-dose administration to rats. About 90 - 97% of the oral diquat dibromide and 84 - 90% of the diquat dichloride were found in the faeces and 4 - 11% of both diquat salts in the urine. Following subcutaneous injection of 14C-diquat (10 mg/kg body weight) in rats, 87% of the administered dose was excreted in the urine and 5% in the faeces within 4 days. The urine contained mainly unchanged diquat (75% of the dose) together with diquat monopyridone (about 3% of the dose) and diquat dipyridone (about 6% of the dose) (FAO/WHO, 1978).