Malic Acid Impurity 2 CAS 140235-34-3

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.140235-34-3
Molecular FormulaC5H8O5
Molecular Weight148.11 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Malic Acid Impurity 2 CAS 140235-34-3 chemical structure

Description

Malic Acid Impurity 2 (C5H8O5) contains a carbohydrate-derived structure. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions.

Malic Acid Impurity 2 (CAS 140235-34-3) is a certified pharmaceutical impurity reference standard with the molecular formula C5H8O5 and a molecular weight of 148.11 g/mol.

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 FormulaC5H8O5
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)2.0
CAS Registry Year (est.)1997

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