Salicylic acid Impurity 12 CAS 546-74-7

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.546-74-7
Molecular FormulaC2H5O4S
Molecular WeightN/A
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Salicylic acid Impurity 12 CAS 546-74-7 chemical structure

Description

The occurrence of Salicylic acid Impurity 12 is closely related to a sulfone group, a carboxylic acid group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

Salicylic acid Impurity 12 (CAS 546-74-7) is a certified pharmaceutical impurity reference standard with the molecular formula C2H5O4SNa and a molecular weight of 148.11 g/mol.

Owing to a sulfone group, a carboxylic acid group, an ether linkage, Salicylic acid Impurity 12 is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 148.11 g/mol — guide the selection of appropriate sample preparation and analytical techniques.

This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.

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 FormulaC2H5O4S Na
Molecular Weight148.11 g/mol
Purity>95%
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityHygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)0.5
CAS Registry Year (est.)1957
Sulfur Atoms1

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