Sulfamethoxazole EP Impurity C CAS 1072-67-9

Purity >90%In StockPharmacopoeial Impurity Standards
CAS No.1072-67-9
Molecular FormulaC4H6N2O
Molecular Weight98.10 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Sulfamethoxazole EP Impurity C CAS 1072-67-9 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 Sulfamethoxazole EP Impurity C.

CATO supplies Sulfamethoxazole EP Impurity C (CAS 1072-67-9), a pharmacopoeial impurity reference standard (molecular formula C4H6N2O, MW 98.10 g/mol) used for the identification and quantification of trace impurities in APIs.

Owing to an amide group, a hydroxyl group, an ether linkage, Sulfamethoxazole EP Impurity C is typically white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 98.10 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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), Sulfamethoxazole EP Impurity C 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 FormulaC4H6N2O
Molecular Weight98.10 g/mol
Purity>90%
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)3.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1957
Nitrogen Atoms2

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