2-chloro-5- [3,6-dihydro-3-methyl-2,6-dioxo-4- (trifluoromethyl)-1-(2h) - pyrimidinyl] -4-fluoro -n - [[methyl - (1-methylethyl) amino] sulfonyl] benzamide hydrate

The present invention relates to hydrates of 2-chloro-5-[3,6-dihydro-3-methyl-2,6-dioxo-4-(trifluoromethyl)-1-(2H)pyrimidinyl]-4-fluoro-N-[[methyl(1-methylethyl)amino]-sulfonyl]benzamide. The invention also relates to a process for the preparation of these hydrates and to plant protection formulations which comprise hydrates of the phenyluracil I.