1. It is widely used in industries including food, medicine, paint, coating, daily-use chemicals, metal processing, textile, plastic, and macromolecule as chelating agent, antioxidant, antistaling agent, color fixative, water softener, accelerant, metal preservative, etc.

2. In the food industry, it is used for the preservation and color protection of fruits, vegetables, and aquatic products, and also as a metal antirust and corrosion inhibitor.