Malic Acid Impurity 3 CAS 66178-02-7

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.66178-02-7
Molecular FormulaC5H8O5
Molecular Weight148.11 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Malic Acid Impurity 3 CAS 66178-02-7 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Malic Acid Impurity 3.

CATO supplies Malic Acid Impurity 3 (CAS 66178-02-7), a pharmacopoeial impurity reference standard (molecular formula C5H8O5, MW 148.11 g/mol) used for the identification and quantification of trace impurities in APIs.

Malic Acid Impurity 3 (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.

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.

As a certified reference material (CRM), Malic Acid Impurity 3 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 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.)1975

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