Origin
E 223 is the salt of sulfur dioxide. For production, sulfur dioxide and sodium sulfite must be dissolved in caustic soda. After this process, one obtains a white to yellowish crystalline solid substance with a pungent odor by evaporating the liquid.
Usage
The food additive E 223 is often used in conjunction with sorbic acid and benzoic acid. Sodium disulfite can be found, among other things, in fruit juices, jams, but also in ready meals such as potato or vegetable dishes. E 223 is frequently used to treat dried fruits and is commonly found in mustard preparations.
Risks
Since sulfur dioxide and its sulfites break down vitamins B1 and B12 in foods, they may not be added to foods that are considered essential for the supply of these vitamins. This naturally includes dairy products. Asthmatics should avoid foods containing the preservative E 223 as it can cause allergic reactions and trigger asthma attacks. Some people also lack enzymes responsible for breaking down sulfites in the body. In such cases, consuming foods containing sodium disulfite can lead to headaches and nausea.