CAS: 4559-70-0 Molecular Formula: C12H11OP Molecular Weight (g/mol): 202.19 MDL Number: MFCD00002079 InChI Key: ASUOLLHGALPRFK-UHFFFAOYSA-N Synonym: diphenylphosphine oxide,phosphine oxide, diphenyl,diphenyl phosphine oxide,hpoph2,asuollhgalprfk-uhfffaoysa-n,dppo,diphenylphosphane oxide,phenylphosphonoylbenzene,diphenylphosphino-1-one,pubchem23810 PubChem CID: 6327869 IUPAC Name: oxo(diphenyl)phosphanium SMILES: O=P(C1=CC=CC=C1)C1=CC=CC=C1