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| Place of Origin: | Hunan |
| Brand Name: | OEM |
| Certification: | SGS,ISO 9001 |
| Model Number: | sodium pyrosulfite-c5 |
| Minimum Order Quantity: | 1 metric ton |
|---|---|
| Price: | usd 300 per metric ton |
| Packaging Details: | 25 kgs bag,1000 kgs big bag |
| Delivery Time: | 5-8 days |
| Payment Terms: | T/T , L/C |
| Supply Ability: | 3000 tons per month |
| Name: | Purification In Chloroform Sodium Pyrosulfite | Other Name: | Purification In Chloroform Sodium Metabisulfite |
|---|---|---|---|
| Grade: | Industrial Grade | Usage: | Purification In Chloroform |
| Packing: | 500kg; 1,000kg; 1,100kg Bulk Sacks | Purity: | Na2S2O5 98% |
| High Light: | smbs sodium metabisulfite,sodium meta bi sulphate |
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Specifications: Industrial Grade (0.001%=10ppm)
| Product Name: | Sodium Metabisulfite | Grade: | Food | |
| Chemical Formula: | Na2S2O5 | Molecular Weight: | 190.1 | |
| CAS Number: | 7681-57-4 | UN No.: | N/A | |
| Hazard Classification: | N/A | Lot No.: | 20130902 | |
| Quantity: | 24MT | Issued Date: | 2013-9-2 | |
| Product Description: | White Powder | Manufacture Date: | 2013-9-2 | |
| Expirty Date: | 2014-9-1 | |||
| Items | Specifications: | Test Results | Unit | |
| Purity(Na2S2O5) | 96.5Min | 97.3 | % | |
| SO2 | 65Min | 65.6 | % | |
| PH Value (5%) | 4.0-4.6 | 4.5 | ||
| Water insoluble | 0.05Max | 0.03 | % | |
| Iron(Fe) | 30Max | 15 | PPM | |
| Arsenic | 1Max | 1 | PPM | |
| Heavy Metal (Pb) | 5Max | 5 | PPM | |
It is commonly used in homebrewing and winemaking to sanitize equipment. It is used as a cleaning agent for potable water reverse osmosis membranes indesalination systems. It is also used to remove chloramine from drinking water after treatment.
When mixed with water, sodium metabisulfite releases sulfur dioxide (SO2), a pungent, unpleasant smelling gas that can also cause breathing difficulties in some people. For this reason, sodium metabisulfite has fallen from common use in recent times, with agents such as hydrogen peroxide becoming more popular for effective and odorless sterilization of equipment. Released sulfur dioxide however makes the water a strong reducing agent.
Sodium metabisulfite releases sulfur dioxide in contact with strong acids:
Na2S2O5 + 2 HCl → 2 NaCl + H2O + 2 SO2
On heating to high temperature, it releases sulfur dioxide, leaving sodium sulfite behind:[11]
Na2S2O5 → Na2SO3 + SO2
It is used as a preservative and antioxidant in food and is also known as E223.[4]
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.[5][6]
Sodium metabisulfite and potassium metabisulfite are the primary ingredients in Campden tablets, used for wine and beer making.[7]
The acceptable daily intake is up to 0.7 milligrams per kilogram of body weight.[8] Sodium metabisulfite oxidizes in the liver to sulfate which is excreted in the urine.[8]
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 preservativeagent.
Added to local anaesthetic (lidocaine etc.) solutions to prevent oxidation of vasoconstrictor adrenaline and thus improve the shelf life of the solution[citation needed]
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 used as the source of SO2 in wine. An important anti-oxidant and bactericide
It is also used to precipitate gold from auric acid (gold dissolved in aqua regia).
It is used in waste treatment to chemically reduce hexavalent chromium to trivalent chromium which can then be precipitated and removed from an aqueous waste stream.
It is used as a bleaching agent in the production of Coconut cream
It is used as a reducing agent to break sulfide bonds in shrunken items of clothing made of natural fibers, thus allowing the garment to go back to its original shape after washing
It is used as an SO2 source (mixed with air or oxygen) for the destruction of cyanide in commercial gold cyanidation processes.
It is used in the oil and gas industry as a corrosion inhibitor/oxygen scavenger.
It is used in the water treatment industry to quench chlorine residual
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