In a soil degradation study the aerobic metabolism of [indole-14C] Amisulbrom and [triazole-14C] Amisulbrom were studied in a sandy loam soil for 120 days at 20 ± 2°C, following application of 0.1 mg a.s./kg (nominal), equivalent to a field application rate of 0.1 kg a.s./ha. The overall mass balance for the study was in the range 95.6 - 101.9% of the applied radioactivity (AR). The DT50 and DT90 values for degradation of [indole-14C] Amisulbrom and [triazole-14C] Amisulbrom were 87 and 288 days, and 106 and 352 days, respectively. The major metabolite detected was IT-4 (maximum of 20.7% AR at 91 days). All other metabolites, IT- 2, IT-5, IT-9, IT-11, IT-14 and one unidentified metabolite were present at lower levels (≤2.8% AR). The amount of extractable radioactivity declined from 100.4 and 97.0% AR at 0 days to 72.7 and 74.5% AR at 120 days for [indole-14C] Amisulbrom and [triazole-14C] Amisulbrom, respectively. Non-extractable radioactivity for [indole-14C] Amisulbrom and [triazole-14C] Amisulbrom increased to 26.4 and 22.8% AR at Day 120, respectively. The total CO2 released amounted to 0.9 and 0.1%, for [indole-14C] Amisulbrom and [triazole-14C] Amisulbrom respectively.