4,​4'-​Diisocyanato-​3,​3'-​dimethyldiphenylmeth​ane CAS 139-25-3

Purity 97%+In StockPharmaceutical Standards
CAS No.139-25-3
Molecular FormulaC17H14N2O2
Molecular Weight278.31 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4,​4'-​Diisocyanato-​3,​3'-​dimethyldiphenylmeth​ane CAS 139-25-3 chemical structure

Description

4,​4'-​Diisocyanato-​3,​3'-​dimethyldiphenylmeth​ane (CAS 139-25-3) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C17H14N2O2. Molecular weight: 278.31 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.

Physical & Chemical Properties

Molecular FormulaC17H14N2O2
Molecular Weight278.31 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)12.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957
Nitrogen Atoms2

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