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Sodium Metabisulfite white dry powder, Wine Making Food Grade 97% Purity Na2S2O5

Categories Sodium Pyrosulfite
Brand Name: OEM
Model Number: sodium pyrosulfite-c3
Certification: SGS,ISO 9001
Place of Origin: Hunan
MOQ: 1 metric ton
Price: usd 300 per metric ton
Payment Terms: T/T , L/C
Supply Ability: 3000 tons per month
Delivery Time: 5-8 days
Packaging Details: 25 kgs bag,1000 kgs big bag
name: sodium pyrosulfite mordant in printing
other name: sodium metabisulfite mordant in printing
situation: dry powder
usage: chemical for mordant in printing industry
packing: 25 kgs plastic woven bag/1000 kgs jumbo bag
mocular: 97% Na2S2O5
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Sodium Metabisulfite white dry powder, Wine Making Food Grade 97% Purity Na2S2O5

Sodium metabisulfite/Sodium Pyrosulfite tech grade

Specification:

ItemsTechnical gradeFood grade
Assay96% min97% min
Assay as SO265% min65% min
Water insoluble0.05% max0.05% max
Ferric (Fe)0.003% max0.003% max
pH value4.0-4.64.0-4.6
Lead (Pb)**0.002% max
Arsenic (As)**0.0002% max

Other uses

  • 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
Sodium metabisulphite

Sodium Metabisulphite SM is used as a preservative in the starch and food industry to control melanosis (black spot) in shrimp; for fermentation in the wine industry; as an antichlor in the chemical industry and as a redox catalyst in the acrylic fibre industry.

The product is also used as a reducing agent in the purification of aldehydes and ketones; in the manufacture of sulphonated oil and resin; for detoxification of cyanide in gold ore processing plants and in the manufacture of photographic chemicals.

Product specifications:

Formula:Na2S2O5
Synonyms
  • Sodium disulphite
  • Sodium pyrosulphite
Grade:

This product is available in three grades:

  • Food
  • Technical
Applications:

Food

  • As a preservative in fruits and starch
  • As an enzyme inhibitor in melanin formation (black and brown spots)

Treatment of waste water
As an antichlor and in the detoxification of cyanide and chromate

Textile
For bleaching wool and jute

Gold mining
To destroy cyanides

Paper and pulp

  • For bleaching ground wood
  • As an antichlor

Photography and film
For developer solutions and acidifying fixing baths

Packaging and transportation
  • 25kg PPE woven / paper bags with heat-sealed HDPE inner liner
  • 25kg HDPE bags
  • 500kg; 1,000kg; 1,100kg bulk sacks

Uses

Food additive

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.

Chemical structure


The anion metabisulfite is a hybrid of dithionite (S2O42−) and dithionate (S2O62−). The anion consists of an SO2 group linked to an SO3 group, with the negative charge more localized on the SO3 end. The S–S bond length is 2.22 Å, and the "thionate" and "thionite" S–O distances are 1.46 and 1.50 Å respectively.[3]

SODIUM METABISULFITE is a white crystalline or powder solid with a slight sulfur odor. Toxic by inhalation . Strongly irritates skin and tissue. Noncombustible, but may decompose to emit toxic oxide fumes of sulfur and sodium when heated to high temperature. A corrosive acid when mixed with water. Used as a food preservative and as a laboratory reagent.

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 indesalination systems. It is also used to remove chloramine from drinking water after treatment.


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