E452iii - Sodium calcium polyphosphate

Origin

Sodium calcium polyphosphate is a synthetic food additive belonging to the polyphosphate family. It is manufactured by polymerizing sodium and calcium phosphates under high temperatures. The resulting product is a glassy or crystalline solid. The ratio of sodium to calcium can vary, influencing its properties and applications. It is a complex salt of polymeric metaphosphates containing sodium and calcium.

Usage

Sodium calcium polyphosphate functions primarily as a sequestrant, emulsifier, and stabilizer 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 and prevent shrinkage during cooking. In dairy products, it can stabilize proteins and prevent coagulation. It also finds application in baked goods, processed cheeses, and beverages. The typical usage levels vary depending on the specific application, but are generally within the range of 0.1% to 1% by weight.

Side Effects

Polyphosphates, including sodium calcium polyphosphate, are generally considered safe for consumption at levels typically used in food. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has established an Acceptable Daily Intake (ADI) 'group ADI' of 0-70 mg/kg body weight for total dietary phosphate from all sources. Excessive intake of phosphates can potentially disrupt calcium metabolism, particularly in individuals with kidney disease or those consuming diets low in calcium. Some studies suggest a possible link between high phosphate intake and cardiovascular issues, but more research is needed to confirm these findings. Allergic reactions are rare but possible.

Regulatory Status

Sodium calcium polyphosphate is permitted for use as a food additive in many countries, including those in the European Union (EU) and the United States. In the EU, it is designated as E452iii. Regulations specify the types of food products in which it can be used and the maximum permitted levels. In the United States, it is generally recognized as safe (GRAS) when used in accordance with good manufacturing practices.