Molecular formula C8H11NO3.C4H6O6.H2O, Molecular weight 337.28, Melting point/freezing point 208.4 - 219.2 °F (98 - 104 °C), pH in aqueous solution 3.5, Synonyms: Noradrenaline bitartrate monohydrate, Levarterenol bitartrate monohydrate, 1,2-Benzenediol, 4-(2-amino-1-hydroxyethyl)-, (R)-[R-(R*,R*)]-2,3-dihydroxybutanedioate (1:1) (salt), monohydrate