Crystalline forms of methyl 2-[2-[2-bromo-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)pyrimidin-1-yl]phenoxy]phenoxy]-2-methoxy-acetate

A crystalline form A of methyl 2-[2-[2-bromo-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)pyrimidin-1-yl]phenoxy]phenoxy]-2-methoxy-acetate, which in an X-ray powder diffraction diagram at 25° C. and Cu—Kα radiation displays at least 3 of the following reflections, quoted as 2θ values:

• 7.6±0.2, 8.9±0.2, 9.3±0.2, 11.2±0.2, 12.7±0.2, 13.4±0.2, 14.3±0.2, 15.8±0.2, 16.6±0.2, 17.6±0.2, 18.6±0.2, 19.1±0.2, 19.8±0.2, 20.4±0.2, 21.0±0.2, 21.4±0.2, 21.9±0.2, 22.5±0.2, 22.6±0.2, 23.0±0.2, 23.6±0.2, 24.7±0.2, 25.5±0.2, 26.3±0.2, 26.6±0.2, 27.1±0.2, 27.9±0.2, 28.5±0.2, 29.0±0.2, 29.4±0.2.