Polyphosphates E452
sequestrant, stabilizer, moisture retention agent, texturizer — Primarily synthetic.
Sodium polyphosphates (E452i), Potassium polyphosphates (E452ii), Calcium polyphosphates (E452iv), Ammonium polyphosphates (E452v)
CAS: 68915-31-1 (i), 68915-31-1 (ii), 50813-16-6 (iv), 68915-31-1 (v)
Factual Regulatory Reference
This database provides factual regulatory information compiled from official government sources. It does not constitute medical, nutritional, or safety advice. Regulatory status varies by country and is subject to change. Always refer to your local regulatory authority for the most current information.
What Is Polyphosphates?
Polyphosphates (sodium polyphosphate, potassium polyphosphate, sodium calcium polyphosphate, calcium polyphosphates) are long-chain phosphate polymers used as emulsifying salts, sequestrants, and water-binding agents in processed meats, canned seafood, and cheese products. They bind calcium and magnesium ions, prevent fat separation, improve texture of processed meats, and extend shelf life by reducing microbial growth conditions. JECFA's group ADI of 70 mg/kg body weight (as phosphorus) applies. EFSA reviewed phosphates in 2019, raising concerns about total phosphorus intake from additive sources.
? Did You Know?
Beyond food, Polyphosphates is also used in cosmetics, medicine, industrial applications, household products. Its versatility makes it one of the most multi-purpose chemical compounds in everyday life.
Regulatory Analysis
Polyphosphates (E452) represent the highest-molecular-weight members of the food phosphate additive family and are subject to the same group ADI of 40 mg/kg body weight per day (as phosphorus) established by EFSA in 2019. Their unique characteristic is that they hydrolyze gradually in food systems to shorter-chain phosphates (diphosphates and orthophosphates), meaning their regulatory classification as polyphosphates describes the form in which they are added rather than necessarily what is present in the final food. EFSA noted this hydrolysis behavior in its 2019 assessment but concluded it did not alter the overall safety assessment, since the hydrolysis products are themselves approved phosphate additives within the same group. Polyphosphates used in processed cheese are particularly important emulsifying salts; EFSA's 2019 recommendation that the European Commission monitor phosphate levels in processed cheese directly implicated this category's contribution to total dietary phosphate exposure.
Detailed Regulatory Assessment
European Union (EFSA)
Quantum satis in many categories; specific limits apply due to concerns about total dietary phosphate intake.
Official EFSA LinkUnited States (FDA)
Widely used in processed cheese and cola beverages
Japan (MHLW)
Compliant with Japanese food sanitation law.
Acceptable Daily Intake (ADI)
International Standard (JECFA)
mg/kg body weight per day
European Standard (EFSA)
Natural Occurrence
This additive is not known to occur naturally in significant quantities.
Manufacturing
Produced by heating orthophosphates or pyrophosphates to temperatures above 600°C, causing progressive condensation to form long-chain polyphosphates. Chain length can be controlled by temperature, time, and starting material composition. Rapid cooling produces glassy polyphosphates, while slow cooling yields crystalline forms.
Applications Beyond Food
Chelating agent and sequestrant in shampoos and toothpaste.
Sequestrant and stabilizer in pharmaceutical formulations.
Water treatment (prevents scale buildup), metal surface treatment, textile processing, oil drilling.
Water softeners, detergents, boiler treatments (trade name Calgon for sodium hexametaphosphate).