Sodium Metabisulfite CAS 7681-57-4

Purity >95%In StockPharmaceutical Standards
CAS No.7681-57-4
Molecular FormulaO5S2
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Sodium Metabisulfite CAS 7681-57-4 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 167.11 g/mol gives Sodium Metabisulfite distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Sodium Metabisulfite (CAS 7681-57-4), molecular formula O5S2Na and molecular weight 167.11 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula O5S2Na, Sodium Metabisulfite contains a sulfone group; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 167.11 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry.

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaO5S2 2*Na
Molecular Weight167.11 g/mol
Purity>95%
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Freely soluble in water
StabilityHygroscopic; reseal immediately after opening
CAS Registry Year (est.)1959
Sulfur Atoms2

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Why CATO?