D-Aspartic Acid 4-Methyl Ester HCl CAS 22728-89-8

Purity 97%+In StockPharmaceutical Standards
CAS No.22728-89-8
Molecular FormulaC5H9NO4
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

D-Aspartic Acid 4-Methyl Ester HCl CAS 22728-89-8 chemical structure

Description

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.

D-Aspartic Acid 4-Methyl Ester HCl (CAS 22728-89-8), molecular formula C5H9NO4HCl and molecular weight 183.59 g/mol, is a CATO reference standard with documented purity and traceability.

D-Aspartic Acid 4-Methyl Ester HCl (C5H9NO4HCl) contains a carbohydrate-derived structure, an amide group, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

Physical & Chemical Properties

Molecular FormulaC5H9NO4 HCl
Molecular Weight183.59 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityLight-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)1.0
CAS Registry Year (est.)1963
Halogen ContentCl-containing
Nitrogen Atoms1

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