Magnesium sulfate heptahydrate, also known as Epsom salt, is a chemical compound with the formula MgSO4·7H2O. It is a hydrated form of magnesium sulfate, meaning it contains seven molecules of water for every molecule of magnesium sulfate. It is a white, crystalline powder or crystals that are highly soluble in water. UsesMagnesium sulphate heptahydrate is used in various sectors. Agriculture: It corrects magnesium and sulphur deficiencies in soils, which are important for plant growth. It's particularly beneficial for potted plants and certain crops. Pharmaceuticals: It's used in pharmaceutical products, including: Epsom salt baths for muscle relaxation and stress reduction. Supplements for magnesium deficiency. Oral laxatives. Intravenous treatments for magnesium imbalance and certain medical conditions like arrhythmias and seizures. Topical applications in creams and ointments. Treatment of preeclampsia and eclampsia. Food Industry: It serves as a food additive (E518), firming agent, anti-caking agent, and flavor enhancer. It's also used to add nutrients to foods. Animal Feed: It is added to animal feed to support various bodily functions in livestock and poultry. Water Treatment: It is used to remove heavy metals and control scale in water systems. Industrial Uses: It has applications in industries like textiles, paper, and construction. It's also used in fireproofing and as a chemical intermediate.