CAS 16731-55-8

Potassium pyrosulfite

Description:

Potassium pyrosulfite, also known as potassium metabisulfite, is an inorganic compound with the formula K2S2O5. It appears as a white crystalline powder and is highly soluble in water, where it dissociates to release sulfite ions. This compound is commonly used as a preservative and antioxidant in food and beverages, particularly in winemaking, due to its ability to inhibit microbial growth and oxidation. In addition to its food applications, potassium pyrosulfite is utilized in various industrial processes, including photography and water treatment, where it acts as a reducing agent. It has a relatively low toxicity, but exposure can cause irritation to the respiratory system and skin. The compound is stable under normal conditions but should be stored in a cool, dry place away from strong acids and oxidizing agents to prevent decomposition. Overall, potassium pyrosulfite is valued for its versatility and effectiveness in both food preservation and industrial applications.

Formula: H₂O₅S₂·2K

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

InChI key: InChIKey=TWDUAWOEUFKDNM-UHFFFAOYSA-N

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

Synonyms:

• Bisulfite de dipotassium
• Dikaliumdisulfit
• Dipotassium Disulphite
• Dipotassium disulfite
• Dipotassium metabisulfite
• Dipotassium pyrosulfite
• Disulfite De Dipotassium
• Disulfito De Dipotasio
• Disulfurous acid, potassium salt (1:2)
• E 224
• Kadifit
• Potassium Metabisulfite
• Potassium disulfite (K2S2O5)
• Potassium disulfite (K₂S₂O₅)
• Potassium metabisulfite (K2S2O5)
• Potassium metabisulfite (K₂S₂O₅)
• Potassium pyrosulfite
• Potassium pyrosulfite (K2S2O5)
• Potassium pyrosulfite (K₂S₂O₅)
• Pyrosulfurous acid, dipotassium salt

Potassium Disulfite

CAS: 16731-55-8

Formula: K₂S₂O₅

Purity: >97.0%(T)

Color and Shape: White to Almost white powder to crystal

Molecular weight: 222.31

Ref: 3B-P2480

Potassium metabisulfite, 95+%

CAS: 16731-55-8

It serves as a component of certain photographic developers and its solution is used in photographic fixing, in the textile industry for dyeing and cotton printing. It is utilized to precipitate gold from solution in aqua regia. This Thermo Scientific Chemicals brand product was originally part of t

Formula: K₂O₅S₂

Purity: 95+%

Molecular weight: 222.31

Ref: 02-043908

Disulfurous acid, potassium salt (1:2)

CAS: 16731-55-8

Formula: K₂O₅S₂

Purity: 95%

Color and Shape: Solid

Molecular weight: 222.3236

Ref: IN-DA001XB1

Potassium metabisulfite, 98%

CAS: 16731-55-8

Formula: K₂S₂O₅

Purity: ≥ 98.0%

Color and Shape: White crystalline powder or colourless crystals

Molecular weight: 222.23

Ref: 7W-GX3502

Potassium Disulfite

CAS: 16731-55-8

Potassium Disulfite

Purity: 97%

Molecular weight: 222.32g/mol

Ref: 54-OR1024480

Potassium metabisulfite

CAS: 16731-55-8

Formula: K₂S₂O₅

Purity: ≥ 95.0%

Color and Shape: White crystalline powder or colourless crystals

Molecular weight: 222.32

Ref: 7W-GX0303

Potassium disulfite

CAS: 16731-55-8

Purity: 95.0%

Color and Shape: Solid, White powder

Molecular weight: 222.30999755859375

Ref: 10-F095812

Potassium Metabisulfite (2:1)

CAS: 16731-55-8

Applications Potassium Metabisulfite (2:1) is used as a chemical preservative.
References Kuang, Y.T., et. al.: J. Food Process. Pres., 39, 56 (2015)

Formula: K₂O₅S₂

Color and Shape: Neat

Molecular weight: 222.32

Ref: TR-P698070