1,3-Bis(5-methyl-3-phenylisoxazol-4-yl)urea CAS 240799-55-7

Purity 97%+In StockPharmaceutical Standards
CAS No.240799-55-7
Molecular FormulaC21H18N4O3
Molecular Weight374.39 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

1,3-Bis(5-methyl-3-phenylisoxazol-4-yl)urea CAS 240799-55-7 chemical structure

Description

1,3-Bis(5-methyl-3-phenylisoxazol-4-yl)urea (CAS 240799-55-7) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C21H18N4O3. Molecular weight: 374.39 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.

Physical & Chemical Properties

Molecular FormulaC21H18N4O3
Molecular Weight374.39 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)15.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2025
Nitrogen Atoms4

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