Trimethoprim EP Impurity I (E-Isomer) CAS 118791-61-0

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.118791-61-0
Molecular FormulaC19H20N2O3
Molecular Weight324.37 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Trimethoprim EP Impurity I (E-Isomer) CAS 118791-61-0 chemical structure

Description

CATO supplies Trimethoprim EP Impurity I (E-Isomer) (CAS 118791-61-0), a pharmacopoeial impurity standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C19H20N2O3. Molecular weight: 324.37 g/mol. Batch-specific COA and technical support are available on request.

Physical & Chemical Properties

Molecular FormulaC19H20N2O3
Molecular Weight324.37 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)11.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1990
Nitrogen Atoms2

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