Sodium metabisulfite Na2S2O5 Italia-Foog grade-25kg Pharmaceuticals & fine Chemical

Sodium metabisulfite
Na2S2O5
Italia-Foog grade-25kg
Pharmaceuticals & fine Chemical
http://en.vietnamchemtech.com.vn/chitietSP.asp?id_pro=478

Product description :

Sodium metabisulfite or sodium pyrosulfite (IUPAC spelling Br. E. sodium metabisulphite or sodium pyrosulphite) is an inorganic compound of chemical formula Na₂S₂O₅. The substance is sometimes referred to asdisodium (metabisulfite). It is used as a disinfectant, antioxidant and preservative agent.

Uses

Food additive

It is used as a preservative and antioxidant in food and is also known as E223.^[3]

It may cause allergic reactions in those who are sensitive to sulfites, including respiratory reactions in asthmatics,anaphylaxis and other allergic reactions in sensitive individuals.^[4][5]

Sodium metabisulfite and potassium metabisulfite are the primary ingredients in Campden tablets, used for wine andbeer making.^[6]

The acceptable daily intake is up to 0.7 mg per kg of body weight.^[7] Sodium metabisulfite has no side effects it is oxidised in the liver to harmless sulfate and excreted in urine.^{[8][clarification needed]}

Sanitization and cleaning agent

It is commonly used in homebrewing and winemaking to sanitize equipment. It is used as a cleaning agent for potable water reverse osmosis membranes in desalination systems. It is also used to remove chloramine from drinking water after treatment.

Other uses

• Added to local anaesthetic(lidocaine etc) solutions to prevent oxidation of vasoconstrictor adrenaline and thus improve the shelflife of the solution
• It is used in photography.^[9]
• Concentrated sodium metabisulfite can be used to remove tree stumps. Some brands contain 98% sodium metabisulfite, and cause degradation of lignin in the stumps, facilitating removal.^[10]
• It is also used as an excipient in some tablets, such as paracetamol. Approximately 0.5 mg is used in epinephrine autoinjectors such as the EpiPen.
• A very important health related aspect of this substance is that it can be added to a blood smear in a test for sickle cell anaemia (and other similar forms of haemoglobin mutation). The substances causes defunct cells to sickle (through a complex polymerisation) hence confirming disease.
• It is also used to precipitate gold from auric acid (gold dissolved in aqua regia).
• Other names[hide]

  Sodium pyrosulfite
  Sodium disulfite
  Identifiers CAS number 7681-57-4  PubChem 24346 EC number 231-673-0 RTECS number UX8225000 PropertiesMolecular formula Na₂S₂O₅, Na-O-(S=O)-O-(S=O)-O-Na Molar mass 190.107 g/mol Appearance white powder Density1.48 g/cm³ Melting point
  >170 °C (begins at 150 °C)
  Solubility in water 54 g/100 ml Hazards MSDS Mallinckrodt MSDS EU Index 016-063-00-2 EU classification Harmful (Xn)
  Irritant (Xi) R-phrases R22 R31 R41 S-phrases (S2) S26 S39 S46 NFPA 704
  

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  Related compounds Other anions Sodium sulfite
  Sodium bisulfite Other cations Potassium metabisulfite Related compounds Sodium dithionite
  Sodium thiosulfate
  Sodium sulfate   (verify) (what is: /?)
  Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references