Sodium metabisulfite, 97%

Catalog No.	Quantity
AAA1735136	500 g
AAA173510E	2500 g
AAA173510C	10,000 g

Catalog No. AAA1735136 Supplier Thermo Scientific Chemicals Supplier No. A1735136

Description

CAS: 7681-57-4 | Na2O5S2 | 190.09 g/mol

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.

Suitable for battery materials development.

Applications
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 cream, as the source of sulfur dioxide and in the destruction of cyanide in commercial gold cyanidation processes. It is utilized in the precipitation of gold from auric acid as well as in the waste water treatment to remove hexavaent chromium as trivalent chromium by precipitation after reduction. Further, it is used in photography. In addition, it plays as an oxygen scavenger to eliminate the dissolved oxygen in wastewater and in pipes.

Solubility
Soluble in water, ethanol and glycerol.

Notes
Moisture and air sensitive. Incompatible with strong oxidizing agents and strong acids.

Specifications

Chemical Identifiers

• CAS: 7681-57-4
• Molecular Formula: Na2O5S2
• Molecular Weight (g/mol): 190.09
• MDL Number: MFCD00167602
• InChI Key: LDTLADDKFLAYJA-UHFFFAOYSA-L
• Synonym: sodium metabisulfite, sodium pyrosulfite, sodium disulfite, disodium pyrosulfite, sodium metabisulphite, disodium disulfite, disodium disulphite, fertisilo, disodium metabisulfite, natrii disulfis
• PubChem CID: 656671
• IUPAC Name: disodium (sulfinatooxy)sulfinate
• SMILES: [Na+].[Na+].[O-]S(=O)OS([O-])=O

• Melting Point: >300°C
• pH: 3.5 to 5.0
• Quantity: 500 g
• Linear Formula: Na₂S₂O₅
• Merck Index: 14,8638
• Solubility Information: Soluble in water,ethanol and glycerol.
• Formula Weight: 190.1
• Percent Purity: 97%
• Odor: Like Rotten Eggs
• Sensitivity: Air and moisture sensitive
• Density: 1.48
• Chemical Name or Material: Sodium metabisulfite

Safety and Handling

Hazard Category	H302-H318
Hazard Statement	GHS H Statement H318-H302 Causes serious eye damage. Harmful if swallowed.
Precautionary Statement	P260-P264b-P270-P280-P301+P312-P305+P351+P338-P310-P314-P330-P501c
EINECSNumber	231-673-0
RTECSNumber	UX8225000
TSCA	Yes
Recommended Storage	Ambient temperatures; Store under Nitrogen

SDS

RUO – Research Use Only