Magnesium hypophosphite is an inorganic compound with the chemical formula MgH2P2O4, which is composed of magnesium ions and hypophosphite ions. Magnesium hypophosphite is usually found in the form of a white powder, it is an important phosphate magnesium fertilizer, and can also be used as a food additive, flame retardant and rust inhibitor, etc.

1. Fertilizer: Magnesium hypophosphite, as a phosphorus-magnesium fertilizer, can provide absorbable phosphorus and magnesium nutrients for plants, promote plant growth and flowering and fruiting. It is commonly used in horticulture and agriculture as a fertilizer supplement, especially where it is necessary to improve plant disease resistance and improve fruit quality.

2. Food additives: Magnesium hypophosphite can be used as a buffer, stabilizer, coagulant, etc. in the food industry to help maintain the acid-base balance of food, improve the texture and taste of food, and extend the shelf life.

3. Flame retardant: Magnesium hypophosphite has high thermal stability, can decompose at high temperatures and absorb heat, so it can be used as a flame retardant additive in plastics, rubber, coatings and other materials to improve the fire performance of these materials.

4. Antirust agent: Magnesium hypophosphite can be used in metal surface treatment to form a protective film to prevent metal oxidation and corrosion. It is often used for anti-rust treatment in automotive, machinery, electronics and other industries.

5. Pharmaceutical intermediates: Magnesium hypophosphite can also be used as a synthetic intermediate for some drugs in the pharmaceutical industry and participate in the production process of drugs.

6. Chemicals: Magnesium hypophosphite can also be used as a chemical in chemical laboratories and industrial production, such as in applications in electroplating solutions, cleaning agents, water treatment agents, etc.