CAS 7681-57-4

Sodium pyrosulfite

Description:

Sodium pyrosulfite, also known as sodium metabisulfite, is an inorganic compound with the chemical formula Na2S2O5. It appears as a white to yellowish crystalline powder and is highly soluble in water, producing a solution that is acidic in nature. This compound is commonly used as a preservative and antioxidant in food and beverage industries, particularly in wine and dried fruits, due to its ability to inhibit microbial growth and oxidation. Sodium pyrosulfite releases sulfur dioxide when dissolved in water, which contributes to its preservative properties. Additionally, it finds applications in various industrial processes, including photography, textile manufacturing, and as a reducing agent in chemical reactions. While generally considered safe in regulated amounts, exposure to high concentrations can cause respiratory irritation and allergic reactions in sensitive individuals. Proper handling and storage are essential to mitigate any potential hazards associated with this compound.

Formula: H₂O₅S₂·2Na

InChI: InChI=1S/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)

InChI key: InChIKey=ZBVPOSMABOMSMZ-UHFFFAOYSA-N

SMILES: S(S(=O)O)(=O)(=O)O.[Na]

Synonyms:

• Campden Tablets
• Colorstrip Catalyst 100
• Dinatriumdisulfit
• Disodium Disulphite
• Disodium disulfite
• Disodium metabisulfite
• Disodium pyrosulfite
• Disodium pyrosulfite (Na2S2O5)
• Disodium pyrosulfite (Na₂S₂O₅)
• Disulfite de disodium
• Disulfito De Disodio
• Disulfurous acid, sodium salt (1:2)
• E 223
• Fertisilo
• NSC 158277
• NSC 227243
• Natriumdisulfite
• Natriummetabisulfit
• Pyrosulfurous acid, disodium salt
• Sobis
• Sobisu
• Sodium Disulfite
• Sodium Metabisulfite
• Sodium Metabisulphite AR (1LB/BT)
• Sodium disulfite (Na2S2O5)
• Sodium disulfite (Na₂S₂O₅)
• Sodium metabisulfite (Na2S2O5)
• Sodium metabisulfite (Na₂S₂O₅)
• Sodium metabisulphite
• Sodium pyrosulfite
• Sodium pyrosulfite (Na2S2O5)
• Sodium pyrosulfite (Na₂S₂O₅)
• Sodium sulfur oxide (Na₂S₂O₅)
• Sodium disulphite
• Sodium pyrosulphite
• Sodium Metabisulfite (Food Grade)
• Disulfurous acid, disodium salt
• disodium oxidosulfanesulfonate oxide
• Metabisulfite Sodium

Sodium metabisulfite, ACS, 97% min

CAS: 7681-57-4

Sodium metabisulfite is used as an active ingredient in campden tablets, as a cleaning agent for potable water reverse osmosis membranes, as a preservative and an antioxidant in food. It also acts as a corrosion inhibitor in oil and gas industry, as a bleaching agent in the production of coconut cr

Formula: Na₂O₅S₂

Purity: 97%

Molecular weight: 190.09

Ref: 02-040115

Sodium metabisulfite, 97%

CAS: 7681-57-4

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Sci

Formula: Na₂O₅S₂

Purity: 97%

Color and Shape: White to pale cream or pale yellow, Crystals or powder or crystalline powder

Molecular weight: 190.09

Ref: 02-A17351

Sodium metabisulfite, SO{2} 58.5% min

CAS: 7681-57-4

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Sci

Formula: Na₂O₅S₂

Molecular weight: 190.09

Ref: 02-033375

Sodium Metabisulfite

CAS: 7681-57-4

Sodium sulfites

Formula: Na₂S₂O₅

Color and Shape: White Powder

Molecular weight: 189.89825

Ref: 45-1614396

Sodium metabisulfite

CAS: 7681-57-4

Formula: Na₂O₅S₂

Purity: 96%

Color and Shape: Solid

Molecular weight: 190.1065

Ref: IN-DA0035LQ

Sodium metabisulfite

CAS: 7681-57-4

Formula: Na₂O₅S₂

Purity: ≥ 95.0%

Color and Shape: White to off-white crystalline powder

Molecular weight: 190.10

Ref: 7W-GK1356

Sodium metabisulfite

CAS: 7681-57-4

Sodium metabisulfite

Formula: HO₃S·Na

Purity: ≥95%

Color and Shape: white crystalline powder

Molecular weight: 104.06g/mol

Ref: 54-IN3247

Sodium metabisulfite

CAS: 7681-57-4

Purity: 97.0%

Color and Shape: Solid, Crystalline Powder or Powder

Molecular weight: 190.08999633789062

Ref: 10-F044703

Sodium Metabisulfite

CAS: 7681-57-4

Formula: Na·O₅S₂

Color and Shape: Off-White

Molecular weight: 190.11

Ref: TR-S667060

Sodium Metabisulphite extrapure AR, 98%

CAS: 7681-57-4

Formula: Na₂S₂O₅

Purity: min. 98%

Color and Shape: White, Crystalline compound, Clear, Colourless

Molecular weight: 190.10

Ref: SR-21705

Sodium Metabisulphite extrapure AR, ACS, ExiPlus, Multi-Compendial, 98%

CAS: 7681-57-4

Formula: Na₂S₂O₅

Purity: min. 98%

Color and Shape: White, Crystalline powder, Clear, Colourless

Molecular weight: 190.10

Ref: SR-52693

Sodium Disulfite

CAS: 7681-57-4

Formula: H₂O₅S₂·Na

Molecular weight: 146.13 22.99

Ref: 4Z-S-175004

Sodium metabisulfite

CAS: 7681-57-4

Sodium metabisulfite is a preservative used to inhibit microbial growth in food and drinks. This chemical has been shown to cause bronchoconstriction in animals, but the mechanism for this effect is not well understood. Sodium metabisulfite may also cause anaphylactic reactions in humans. There are no toxicity studies available for sodium metabisulfite injection solutions, but it has been shown that anhydrous sodium metabisulfite can be toxic at high doses. The effects of sodium metabisulfite on human cells have been studied using a surface methodology and cytotoxicity assay. These experiments showed that sodium metabisulfite significantly reduced cellular viability and had significant cytotoxic effects on cells. The mechanism of this cell death was found to be due to the enzyme activity of sulfite oxidase, which produces hydrogen peroxide as a by-product. This hydrogen peroxide causes oxidative stress and leads to the production of reactive oxygen species (ROS) that induce DNA damage

Formula: Na₂S₂O₅

Purity: Min. 97%

Color and Shape: Powder

Molecular weight: 190.11 g/mol

Ref: 3D-FS40910