E450viii - Dimagnesiumdiphosphat

Origin

E450viii refers to a specific type of polyphosphate, namely pentasodium triphosphate. Polyphosphates are generally produced by heating orthophosphates. Pentasodium triphosphate is synthesized by combining sodium carbonate and phosphoric acid under controlled conditions, followed by dehydration through heating. The resulting product is a glassy or crystalline solid.

Usage

Pentasodium triphosphate functions primarily as a sequestrant, emulsifier, and buffering agent in food products. As a sequestrant, it binds to metal ions, preventing them from reacting with other food components and causing undesirable changes in color, flavor, or texture. It is used in processed meats to improve water-holding capacity, resulting in a juicier product. In dairy products, it can stabilize proteins and prevent coagulation. It is also found in baked goods, where it acts as a leavening agent and improves texture. The typical usage levels vary depending on the application, but are generally within the range permitted by food regulations. The ADI (Acceptable Daily Intake) for phosphates (expressed as phosphorus) is 70 mg/kg body weight.

Side Effects

While generally regarded as safe (GRAS) at permitted levels, excessive consumption of phosphates can lead to imbalances in mineral metabolism. High phosphate intake can interfere with calcium absorption, potentially leading to bone problems, particularly in individuals with kidney disease or those with inadequate calcium intake. Some individuals may experience gastrointestinal discomfort, such as nausea or diarrhea, with high doses of phosphate additives. Regulatory bodies like EFSA and the FDA have established acceptable daily intake levels to minimize these risks. It's important to note that the overall phosphate intake from all sources (food additives, naturally occurring phosphates in foods) should be considered.

Regulatory Status

Pentasodium triphosphate (E450viii) is approved for use as a food additive in many countries, including those within the European Union and the United States. Regulations specify the types of food products in which it can be used and the maximum permitted levels. These regulations are in place to ensure that consumer exposure remains within safe limits. The FDA regulates it under 21 CFR Part 182 as GRAS (Generally Recognized As Safe) when used in accordance with good manufacturing practices. EFSA has also evaluated the safety of phosphates and established an ADI for total phosphate intake.