D-(+)-Malic Acid CAS 636-61-3

Purity >95%In StockPharmaceutical Standards
CAS No.636-61-3
Molecular FormulaC4H6O5
Molecular Weight134.09 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

D-(+)-Malic Acid CAS 636-61-3 chemical structure

Description

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.

D-(+)-Malic Acid (CAS 636-61-3) is a high-purity analytical reference standard with the molecular formula C4H6O5 and a molecular weight of 134.09 g/mol.

D-(+)-Malic Acid (C4H6O5) 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.

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 FormulaC4H6O5
Molecular Weight134.09 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.)1957

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