Lactulose Name: Lactulose Synonyms 4-O-beta-D-Galactopyranosyl-alpha-D-fructose Molecular Formula C12H22O11 Molecular Weight 342.30 CAS Registry Number 4618-18-2 EINECS 225-027-7 Melting point 173-178 ºC alpha -47 º (c=5, H2O, 12hr) Water solubility 76.4 g/100 mL (30 ºC) ...