Sodium tetraphosphate

Sodium tetraphosphate (CAS 7727-67-5) is a condensed phosphate salt used across industrial and food-grade applications for its ability to sequester metal ions and buffer pH levels.

It modifies the behavior of mineral suspensions and is distinct from the more common STPP, occupying a specific niche where higher-chain phosphate chemistry is required for performance.

In water treatment, it controls scale formation and stabilizes metal ions in distribution systems, effectively reducing fouling in pipelines and industrial equipment during long-term operation.

Textile, leather, and paper processors use it to sequester hardness ions in process water, preventing interference with dyes, tanning agents, and various chemical fiber treatments.

In food manufacturing, it functions as a sequestrant and buffering agent in processed formulations where mineral control affects the final texture and overall shelf stability of the product.

Home care and industrial cleaning formulations incorporate it to enhance detergent performance by binding calcium and magnesium ions that would otherwise reduce surfactant efficiency in hard water.

Sodium tetraphosphate is typically supplied as a white powder or granule. Technical grade is the most common commercial form, with food-grade material available for direct food contact.

Buyers should confirm chain length and purity specifications with suppliers, as condensed phosphate products vary in composition across different production sources and manufacturing methods.