E225 - Kaliumsulfit

Origin

Calcium disulphite (E225) is an inorganic salt formed by combining calcium and sulphite ions. It is primarily produced synthetically by reacting calcium compounds, such as calcium hydroxide or calcium carbonate, with sulphur dioxide gas in aqueous solutions. The resulting solution is then processed to isolate the calcium disulphite. It is part of the sulphite family of additives.

Usage

Calcium disulphite is used as a preservative, primarily in the brewing industry. It acts as an antimicrobial agent, inhibiting the growth of undesirable bacteria and wild yeasts that can spoil beer and other fermented beverages. It is also used to prevent oxidation, which can lead to off-flavors and discoloration. Its use is less common than other sulphites like potassium metabisulphite or sodium sulphite. The permitted levels of calcium disulphite are regulated to ensure consumer safety. It is also used in some fruit and vegetable preservation processes.

Side Effects

Sulphites, including calcium disulphite, are known allergens for some individuals. Reactions can range from mild symptoms like hives and itching to severe reactions such as asthma attacks and anaphylaxis. Individuals with sulphite sensitivity should avoid products containing E225. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has established an Acceptable Daily Intake (ADI) of 0-0.7 mg of total sulphites per kg of body weight. It's important to note that this ADI refers to the total intake of all sulphites, not just calcium disulphite. As such, the contribution of E225 to the overall sulphite intake needs to be considered. Overconsumption of sulphites can lead to gastrointestinal distress in sensitive individuals.

Regulatory Status

Calcium disulphite (E225) is permitted for use as a food additive in several countries, including those within the European Union. Its use is regulated by the European Food Safety Authority (EFSA), which sets maximum permitted levels in various food categories. The FDA in the United States does not generally recognize calcium disulphite as GRAS (Generally Recognized As Safe). Labelling regulations require that foods containing sulphites at levels of 10 ppm or more must declare the presence of sulphites on the label.