Magnesium sulfate heptahydrate is a hydrate method of magnesium sulfate. It functions as an optimum quality laxative as well as a cathartic. This is a magnesium salt that is often encountered as the heptahydrate sulfate mineral. This is a colorless crystalline powder, which works as an anticonvulsant, electrolyte replenisher and cathartic substance. This is demanded for the treatment of eclampsia and pre-eclampsia. It has its main constituent as the magnesium, oxygen and sulphur.