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Sodium metabisulfite

Tải về

Product details:

- Product Name: Sodium metabisulfite

- Formulas : Na2S2O5

- Chemical composition : Italia-Foog grade-25kg

- Product Type: Chemical for Sugar refinery

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 as disodium (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 and beer 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 Properties Molecular formula Na₂S₂O₅, Na-O-(S=O)-O-(S=O)-O-Na Molar mass 190.107 g/mol Appearance white powder Density 1.48 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

SAME PRODUCTS

Vichemfloc 62424-Anion flocculant	Vichemfloc 84812	Activated carbon granular-Norit	Vichemfloc 85610	Vichemfloc 63020
Sodium carbonate	Sodium chloride	Na2EDTA	Sodium chloride