Ascorbic Acid EP Impurity G CAS 66757-69-5

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.66757-69-5
Molecular FormulaC6H6O7
Molecular Weight190.11 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Ascorbic Acid EP Impurity G CAS 66757-69-5 chemical structure

Description

Based on its molecular formula C6H6O7, Ascorbic Acid EP Impurity G contains a carbohydrate-derived structure; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 190.11 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

As a process- or degradation-related impurity, Ascorbic Acid EP Impurity G (CAS 66757-69-5, C6H6O7) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.

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.

As a certified reference material (CRM), Ascorbic Acid EP Impurity G meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC6H6O7
Molecular Weight190.11 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity>95%
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityMay oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1976

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