Sodium bisulfite CAS 7631-90-5

Purity 97%+In StockPharmaceutical Standards
CAS No.7631-90-5
Molecular FormulaHO3S
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Sodium bisulfite CAS 7631-90-5 chemical structure

Description

The occurrence of Sodium bisulfite is closely related to a sulfone group in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

Sodium bisulfite (CAS 7631-90-5) is a high-purity analytical reference standard with the molecular formula HO3SNa and a molecular weight of 104.06 g/mol.

Sodium bisulfite (HO3SNa) contains a sulfone group. It is notably hygroscopic; these physicochemical properties determine the optimal preparation and storage of its standard solutions.

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

As a certified reference material (CRM), Sodium bisulfite meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaHO3S Na
Molecular Weight104.06 g/mol
Purity97%+
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 Atoms1

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