About
Polyphosphates (E452) are a group of inorganic phosphate polymer salts — comprising sodium, potassium, sodium-calcium, and calcium polyphosphate forms — used in food processing as emulsifiers, stabilizers, sequestrants, and thickeners. They are commonly added to processed meats, seafood, bakery products, and soft drinks to retain moisture, improve texture and tenderness, prevent microbial growth, and extend shelf life.
Safety summary
EFSA derived a group ADI of 40 mg/kg body weight per day (expressed as phosphorus) for all food-additive phosphates including E452 in its 2019 re-evaluation, finding no concern for genotoxicity or carcinogenicity; however, estimated dietary exposure may exceed this ADI for some consumers, particularly those using phosphate-containing food supplements. The ADI explicitly does not apply to individuals with moderate to severe kidney dysfunction, who face risks of hyperphosphatemia. Emerging research also raises concerns about potential cardiovascular effects and adverse gut microbiome changes with excessive polyphosphate intake.
Regulatory landscape
| Jurisdiction | Status | Note |
|---|---|---|
| FSSAI (Food Safety and Standards Authority of India) (India) | Approved | Polyphosphates are permitted as food additives under the Food Safety and Standards (Food Products Standards and Food Additives) Regulations, 2011 for specified food categories including processed meat and seafood products; food-category-specific maximum use levels are defined in the FSSAI compendium.source |
| FDA (Food and Drug Administration) (United States) | Approved | Sodium hexametaphosphate (primary E452 subtype) is classified as GRAS under 21 CFR 182.6760 for use as an emulsifier, sequestrant, and texturizer. Other polyphosphate salts are permitted as direct food additives under 21 CFR Part 182 with use governed by GMP conditions.source |
| EFSA (European Food Safety Authority) (European Union) | Under_review | European Commission published a 2023 call for technical data specifically on E452(i insoluble), E452(ii), E452(iii), and E452(iv) to address nanoscale particle safety questions identified by EFSA; these subtypes remain on the Union permitted-additives list pending operator data submission under Regulation (EU) 2015/2283.source |
Who should approach with care
Research citations
- 1other. Call for technical data on the permitted food additives phosphoric acid–phosphates – di-, tri- and polyphosphates (E 338–341, E 343, E 450–452), 2023. food.ec.europa.eu
- 2PubMed. Hexametaphosphate, a Common Food Additive, Aggregated the Hen Egg White Lysozyme, 2023. pmc.ncbi.nlm.nih.gov
- 3EFSA. Re-evaluation of phosphoric acid–phosphates – di-, tri- and polyphosphates (E 338–341, E 343, E 450–452) as food additives and the safety of proposed extension of use, 2019. efsa.europa.eu
- 4PubMed. Re-evaluation of phosphoric acid-phosphates - di-, tri- and polyphosphates (E 338-341, E 343, E 450-452) as food additives and the safety of proposed extension of use, 2019. pubmed.ncbi.nlm.nih.gov
- 5EFSA. EFSA issues new advice on phosphates, 2019. efsa.europa.eu
