E332ii - Tripotassium citrate

Origin

Tripotassium citrate is a potassium salt of citric acid. It is produced by the complete neutralization of citric acid with a high-purity potassium source, followed by crystallization and drying. Citric acid itself is naturally present in citrus fruits, but for industrial production, it's typically derived from the fermentation of sugars by *Aspergillus niger*.

Usage

Tripotassium citrate is used in the food industry primarily as an acidity regulator, buffer, and sequestrant. It helps to control the pH of food products, preventing spoilage and maintaining desired texture and flavor. It is commonly found in beverages, processed foods, and dairy products. As a sequestrant, it binds to metal ions, preventing them from reacting with other food components and causing discoloration or off-flavors. It is also used in some pharmaceutical applications and as an electrolyte replenisher in sports drinks.

Side Effects

Tripotassium citrate is generally recognized as safe (GRAS) by regulatory agencies when used in accordance with good manufacturing practices. High doses may cause gastrointestinal discomfort, such as nausea, diarrhea, or abdominal cramping, particularly in individuals sensitive to potassium salts. Individuals with kidney problems should exercise caution, as excessive potassium intake can lead to hyperkalemia (elevated potassium levels in the blood). No Acceptable Daily Intake (ADI) has been specifically set for tripotassium citrate by EFSA or JECFA, indicating its low toxicity. However, potassium intake should be monitored, especially in vulnerable populations.

Regulatory Status

Tripotassium citrate is approved for use as a food additive in many countries, including the United States, the European Union, and Canada. It is regulated under different food additive regulations in each region. In the EU, it is listed under E332(ii). In the US, it is considered GRAS and is regulated under specific sections of the Code of Federal Regulations (CFR).