Magnesium sulfate granules based on synthetic magnesium sulfate

The invention relates to magnesium sulfate granules at least 90 wt .-%, based on the total mass of magnesium sulfate granules, made of synthetic magnesium sulfate hydrate and a loss on drying of less than 2 wt .-%, determined by drying the granules for 2 h at 105 ° C and 1 bar having. The invention also relates to a process for preparing these magnesium sulfate granules and their use in urea-containing fertilizer compositions.