Potassium metabisulfite, 95+%

Catalog No.	Quantity
AA4390822	100 g
AA4390836	500 g
AA43908A3	2 kg

Catalog No. AA4390822 Supplier Thermo Scientific Chemicals Supplier No. 04390822

Description

CAS: 16731-55-8 | K2O5S2 | 222.31 g/mol

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 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 Scientific Chemicals.

Specifications

Chemical Identifiers

• CAS: 16731-55-8
• Molecular Formula: K2O5S2
• Molecular Weight (g/mol): 222.31
• MDL Number: MFCD00167605
• InChI Key: RWPGFSMJFRPDDP-UHFFFAOYSA-L
• Synonym: potassium metabisulfite, potassium disulfite, potassium pyrosulfite, dipotassium disulfite, dipotassium pyrosulfite, dipotassium metabisulfite, dipotassium disulphite, unii-65oe787q7w, ccris 1427, potassium disulfite k2s2o5
• PubChem CID: 28019
• IUPAC Name: dipotassium sulfinatosulfonate
• SMILES: [K+].[K+].[O-]S(=O)S([O-])(=O)=O

• Melting Point: 190°C (decomposition)
• Color: White
• Physical Form: Powder
• Quantity: 100 g
• Assay Percent Range: >99%
• Solubility Information: Soluble in water. Insoluble in ethanol.
• Formula Weight: 222.32
• Odor: Pungent
• Sensitivity: Air Sensitive
• Chemical Name or Material: Potassium metabisulfite

Safety and Handling

Hazard Category	H318
Precautionary Statement	P280-P305+P351+P338-P310
EINECSNumber	240-795-3
TSCA	Yes
Recommended Storage	Ambient temperatures; Store under Nitrogen

SDS

RUO – Research Use Only