Chemical-structure (Naproxen 375 Usp 1)
Naproxen is a chemical compound that contains a carboxylic acid group (-COOH) and has a molecular formula of CyHy,O with a molecular weight of 123,026. Naproxen sodium is a salt of naproxen in which the carboxylic acid group is replaced by a sodium salt (-COONa) and has a molecular formula of Cy¢H;gNaOy with a molecular weight of 252.23. Further information on their usage or properties is not available from this text.*