Sodium tetraphosphate

Sodium tetraphosphate (CAS 7727-67-5) is a condensed phosphate salt that sequesters metal ions and buffers pH levels.

Where is Sodium tetraphosphate used?

• Water treatment: scale control and metal ion stabilisation in distribution systems, reducing pipeline fouling
• Textile, leather and paper processing: sequestration of hardness ions in process water to prevent interference with dyes, tanning agents and fibre treatments
• Food manufacturing: sequestrant and buffering agent where mineral control affects texture and shelf stability
• Home care and industrial cleaning: binds calcium and magnesium ions to preserve surfactant efficiency in hard water
• It modifies the behaviour of mineral suspensions in higher-chain phosphate niches.

Good to know: Distinct from the more common STPP; it occupies a niche where higher-chain phosphate chemistry is required. Buyers should confirm chain length and purity specifications, as composition varies by production source.

Commercial specifications

• Verify chain length and purity with suppliers