E340 - Kaliumphosphat

Origin

Potassium phosphates are salts derived from phosphoric acid and potassium hydroxide. They encompass a range of compounds, including monopotassium phosphate (E340(i)), dipotassium phosphate (E340(ii)), and tripotassium phosphate (E340(iii)). These compounds are synthetically produced through the neutralization of phosphoric acid with potassium carbonate or potassium hydroxide.

Usage

Potassium phosphates serve multiple functions in the food industry. They act as buffering agents, controlling the acidity and alkalinity of food products. They also function as emulsifiers, helping to stabilize mixtures of oil and water. Furthermore, they can act as sequestrants, binding to metal ions and preventing unwanted reactions that can lead to discoloration or off-flavors. They are used in processed cheeses, processed meats, baked goods, powdered beverages, and dairy products to improve texture, stability, and shelf life. In some cases, they are used as a nutrient supplement, providing a source of potassium and phosphorus.

Side Effects

Potassium phosphates are generally recognized as safe (GRAS) by regulatory bodies when used in accordance with good manufacturing practices. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has established an Acceptable Daily Intake (ADI) of "group ADI for phosphates expressed as phosphorus is 70 mg/kg bw". Excessive consumption of phosphates, including potassium phosphates, may contribute to an imbalance of minerals in the body, potentially affecting calcium absorption and bone health, especially in individuals with kidney problems. High phosphate intake may also be linked to cardiovascular issues in susceptible individuals. Individuals with kidney dysfunction should be particularly cautious about consuming foods high in phosphates, as their kidneys may not be able to efficiently remove excess phosphate from the blood. Allergic reactions are rare but possible.