CAS 7757-83-7

Sodium sulfite

Description:

Sodium sulfite, with the chemical formula Na2SO3 and CAS number 7757-83-7, is an inorganic compound characterized by its white crystalline appearance and hygroscopic nature, meaning it can absorb moisture from the air. It is soluble in water, forming a mildly alkaline solution. Sodium sulfite is primarily used as a preservative and antioxidant in food and beverages, as well as in various industrial applications, including water treatment and the paper manufacturing process. It acts as a reducing agent, which makes it valuable in chemical synthesis and photography. The compound can release sulfur dioxide when heated or when it reacts with acids, which is an important consideration in handling and storage. Sodium sulfite is generally regarded as safe in low concentrations, but exposure to high levels can cause irritation to the respiratory system and skin. Proper safety measures should be taken when handling this compound to avoid potential health risks.

Formula: H₂O₃S·2Na

InChI: InChI=1S/2Na.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)

InChI key: InChIKey=YKZJGZHPDUVUKN-UHFFFAOYSA-N

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

Synonyms:

• Anhydrous sodium sulfite
• Disodium sulfite
• Disodium sulfite (Na2SO3)
• Disodium sulfite (Na₂SO₃)
• E 221
• Natriumsulfit
• S-Wat
• Sodium Sulfite Anhydrous
• Sodium Sulphite
• Sodium sulfite
• Sodium sulfite (Na2SO3)
• Sodium sulfite (Na₂SO₃)
• Sulfite de sodium
• Sulfito De Sodio
• Sulfurous acid, sodium salt (1:2)
• Sulphurous acid, sodium salt (1:2)
• Sulfurous acid, disodium salt

Sodium sulfite, ACS, 98.0% min

CAS: 7757-83-7

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: H₁₄Na₂O₁₀S

Purity: 98.0%

Molecular weight: 252.14

Ref: 02-013454

Sodium sulfite, anhydrous, 98%

CAS: 7757-83-7

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: H₁₄Na₂O₁₀S

Purity: 98%

Color and Shape: White to pale yellow, Crystalline powder or crystals

Molecular weight: 252.14

Ref: 02-A17933

Sodium Sulfite Anhydrous

CAS: 7757-83-7

Purity: 98.0%

Color and Shape: Solid

Molecular weight: 126.04000091552734

Ref: 10-F044726

Sodium sulfite

CAS: 7757-83-7

Formula: Na₂O₃S

Purity: 97%

Color and Shape: Solid

Molecular weight: 126.0427

Ref: IN-DA0036IA

Sodium sulfite, anhydrous

CAS: 7757-83-7

Formula: Na₂SO₃

Purity: 98.0 - 102.0 % (dried basis)

Color and Shape: White crystalline powder

Molecular weight: 126.04

Ref: 7W-GE2515

Sodium sulfite, anhydrous, 98+% (ACS)

CAS: 7757-83-7

Sodium sulfite, anhydrous, 98+% (ACS)

Formula: Na₂SO₃

Purity: 98+%

Color and Shape: white pwdr.

Molecular weight: 126.04

Ref: 08-93-1184

Sodium Sulfite

CAS: 7757-83-7

Applications Sodium sulfite is mainly used for the manufacture of detergents and in the Kraft process of paper pulping. Sodium sulfite is also used as a fining agent, to help remove small air bubbles from molten glass, in the glass industry.
References Brooks, M., et al.: Chem. Eng. Res. Des., 84, 139 (2006); Evans, J., et al.: Paper Trade J., 143, 42 (1959); Skvara, F.: Chemicky Prumysl, 28, 425 (1978)

Formula: Na₂O₃S

Color and Shape: White To Off-White

Molecular weight: 126.04

Ref: TR-S689135

Sodium sulfite hydrate

CAS: 7757-83-7

Sodium sulfite is a salt that is used as a food additive and in the chemical industry. It has been used to study the toxicity of sodium salts and their effect on the cardiovascular system. Sodium sulfite is also used as a diagnostic agent in ethylene diamine tests, which are used to detect fatty acid levels in blood serum. The process optimization of sodium citrate production has been studied using sodium sulfite heptahydrate. Hydrochloric acid can be used to remove sulfur dioxide from sodium sulfite heptahydrate, producing anhydrous sodium sulfate. Sodium carbonate can be produced by adding water to anhydrous sodium sulfate, forming a solution of hydrogen ions and hydroxide ions. Sodium carbonate can also be produced through the reaction of anhydrous sodium with carbon dioxide gas or calcium oxide. Hydrogen bonds between molecules may be disrupted by adding hydrochloric acid to anhydrous sodium sulfate, leading to the formation of diphenyl ether

Formula: Na₂SO₃•(H₂O)x

Purity: (%) Min. 98%

Color and Shape: Powder

Molecular weight: 126.04 g/mol

Ref: 3D-KAA10215

Sodium Sulphite Anhydrous extrapure AR, ACS, ExiPlus, Multi-Compendial, 98%

CAS: 7757-83-7

Formula: Na₂SO₃

Purity: min. 98%

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

Molecular weight: 126.04

Ref: SR-29814

Sodium Sulphite Anhydrous extrapure AR, 98%

CAS: 7757-83-7

Formula: Na₂SO₃

Purity: min. 98%

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

Molecular weight: 126.04

Ref: SR-32246