Name for the salts and ester the sulphurous acid. The term is also used colloquially for sulfur or sulfur dioxide used. In the winemaking become the sulfur compounds pyrosulphite and metabisulfite used as an antioxidant. Since 2005, all wines that contain more than 10 mg / l sulfur must be on label the statement "contains sulfites" or "contains sulfur dioxide". However, this value can hardly be fallen below and can therefore be found on almost every label. The labeling requirement stems from the fact that people with a hypersensitivity to sulfites when consuming even small amounts of sulfite have intolerance reactions such as asthma, allergic Immune system reactions, urticaria and low blood pressure may show. The maximum permissible and different limit values for each wine type are under the keyword sulphurous acid specified.