CAS: 527688-20-6 Molecular Formula: C13 H17 O2 . 2 H2 O . Na Molecular Weight (g/mol): 264.293 Synonym: Benzeneacetic acid, α-methyl-4-(2-methylpropyl)-, sodium salt, hydrate (1:1:2) (ACI),Benzeneacetic acid, α-methyl-4-(2-methylpropyl)-, sodium salt, dihydrate (9CI),Ibuprofen sodium dihydrate,Sodium ibuprofen dihydrate IUPAC Name: sodium;2-[4-(2-methylpropyl)phenyl]propanoate;dihydrate SMILES: O.O.[Na+].CC(C)Cc1ccc(cc1)C(C)C(=O)[O-]