D-Ascorbic Acid Impurity 19 CAS 67776-07-2

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.67776-07-2
Molecular FormulaC7H12O7
Molecular Weight208.17 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

D-Ascorbic Acid Impurity 19 CAS 67776-07-2 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 208.17 g/mol gives D-Ascorbic Acid Impurity 19 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

D-Ascorbic Acid Impurity 19 (CAS 67776-07-2) is a certified pharmaceutical impurity reference standard with the molecular formula C7H12O7 and a molecular weight of 208.17 g/mol.

Structurally, D-Ascorbic Acid Impurity 19 (C7H12O7) contains a carbohydrate-derived structure. The molecule exhibits a degree of unsaturation (DBE) of 2.0, corresponding to approximately 2 ring(s) or double-bond equivalent(s). With a molecular weight of 208.17 g/mol, it falls into the medium-molecular-weight range.

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

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 FormulaC7H12O7
Molecular Weight208.17 g/mol
Purity>95%
StorageStore in a cool place (≤25°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.)1976

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