Sodium metaphosphate is a white, crystalline substance that finds application in a variety of industries, including water treatment, chemical manufacturing, and food processing. As a water treatment chemical, it can remove heavy metal ions from water. In chemical manufacturing, it serves as a catalyst and stabilizer for certain reactions. In the food industry, it acts as a sequestrant and emulsifier, improving texture and stability in food products. Additionally, it can be used to prevent color and flavor changes in certain foods.

In the detergent industry, sodium metaphosphate serves as a builder, softening hard water and improving cleaning performance. It also acts as a dispersant to prevent clumping of the detergent ingredients. Its versatility and effectiveness make it an important ingredient in many detergents.