Pentasodium Triphosphate (E451I): What It Is and Is It Safe?
Sodium tripolyphosphate (Na₅P₃O₁₀), one of the most widely used phosphate additives in food processing. Used in seafood and poultry to retain moisture, maintain texture, and extend shelf life. Also used in processed cheese and meats. High cumulative phosphate from processed foods is linked to kidney damage and cardiovascular disease risk. The WHO has flagged excessive phosphate intake as a concern particularly for those with chronic kidney disease.
- Category
- Stabiliser / Water Retention Agent
- Typically used in
- Prawns, scallops, fish fillets, processed poultry, processed cheese, canned meats
- Regulatory status
- Approved EU/USA/UK. Caution for those with kidney conditions. WHO notes excessive phosphate risk.
- Also listed as
- Sodium Tripolyphosphate, STPP
- Concerns flagged
-
Cardiovascular concernKidney effects
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Where this comes from
- EFSA (2019) — Re-evaluation of phosphoric acid-phosphates – di-, tri- and polyphosphates (E 338–341, E 343, E 450–452) as food additives https://efsa.onlinelibrary.wiley.com/doi/10.2903/j.efsa.2019.5674
Products containing Pentasodium Triphosphate
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