Sodium sulfite CAS 7757-83-7

Purity 100μg/mL in FormaldehydeIn StockPharmaceutical Standards
CAS No.7757-83-7
Molecular FormulaO3S
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Sodium sulfite CAS 7757-83-7 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Sodium sulfite.

Sodium sulfite (CAS 7757-83-7), molecular formula O3SNa and molecular weight 103.05 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of Sodium sulfite (O3SNa) is characterized by a sulfone group. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development.

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.

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 FormulaO3S 2*Na
Molecular Weight103.05 g/mol
Purity100μg/mL in Formaldehyde
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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Why CATO?