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Name:metabisulfito sódico

Synonims:  Sodium pyrosulfite   Sodium disulfite

CAS number:   [7681-57-4]

PubChem:   24346

EC number:   231-673-0

RTECS number:   UX8225000

Sodium metabisulfite or sodium pyrosulfite (IUPAC spelling; Br. E. sodium metabisulphite or sodium pyrosulphite) is an inorganic compound of chemical formula Na2S2O5. The name is sometimes referred to as disodium (metabisulfite, etc). It is used as a disinfectant, antioxidant and preservative agent. It may cause allergic reactions in those who are sensitive to sulfites, including respiratory reactions in asthmatics as well as in those who do not identify with the condition.It is present in many dilutable squashes (i.e. fruit juice concentrates) and in candy bars such as Mounds.Sodium metabisulfite and potassium metabisulfite are the primary ingredients in Campden tablets, used for wine and beer making.The acceptable daily intake is up to 0.7 mg per kg of body weight. Sodium metabisulfite has no side effects; it is oxidised in the liver to harmless sulfate and excreted in the urine.

Product name
Sodium metabisulfite
Molar mass 190.107 g/mol
Appearance white powder
Density 1.48 g/cm3
Melting point 170 °C (begins at 150 °C) max
Solubility in water 54 g/100 ml
alpha 104 º (c=1, H2O 25 ºC)



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