Sodium hexametaphosphate

Sodium hexametaphosphate (CAS 68915-31-1), commonly abbreviated as SHMP and listed as E452i in food applications, is a polyphosphate salt used across industrial and food-grade markets. It acts as a sequestrant, dispersant, and scale inhibitor by binding calcium, magnesium, and heavy metal ions. This prevents scale formation, mineral interference, and unwanted precipitation in complex formulations.

In water treatment, SHMP controls scale and corrosion in cooling towers, boilers, and municipal distribution systems. It works by sequestering hardness minerals before they deposit on surfaces or equipment. Food manufacturers use it as a moisture-retention and texture agent in processed meats, seafood, dairy, and canned products. It also stabilizes emulsions and controls pH levels during processing.

In industrial cleaning and detergent formulations, it softens water and prevents redeposition of soils onto surfaces. This improves overall wash performance and efficiency in commercial cleaning applications. Textile and paper processors rely on it to disperse minerals in process water, protecting equipment and ensuring consistent product quality. It is supplied as a white powder or granule for easy handling.

Standard grades include food-grade (FCC, E452i-compliant) and technical-grade for industrial applications. Purity levels and chain-length specifications vary by grade depending on the specific use case. Buyers should confirm these specifications against their specific process or regulatory requirements. This ensures the material meets the necessary standards for the intended industrial or food application.