D-Lyxose

Title: D-Lyxose
CAS Registry Number: 1114-34-7
CAS Name: a-D-Lyxose
Molecular Formula: C5H10O5
Molecular Weight: 150.13
Percent Composition: C 40.00%, H 6.71%, O 53.29%
Literature References: Prepd by the oxidation of calcium D-galactonate: Clark, J. Biol. Chem. 31, 605 (1917); Fletcher et al., J. Am. Chem. Soc. 72, 4546 (1950); by g-irradiation of lactose: Adachi, J. Dairy Sci. 45, 1427 (1962). Structure of b-D-lyxose: Hordvik, Acta Chem. Scand. 15, 1781 (1961).
Properties: Hygroscopic monoclinic prisms from ethanol + ether, mp 106-107°. Sweet taste. d20 1.545. Shows mutarotation: [a]D20 +5.5° ® -14.0° (c = 0.82 in water). Freely sol in water. One part dissolves in 38 parts abs alc at 17°; 100 ml of 90% alc satd at 20° contain 7.9 g.
Melting point: mp 106-107°
Optical Rotation: [a]D20 +5.5° ® -14.0° (c = 0.82 in water)
Density: d20 1.545
DMAN D-Mannitol Hexanitrate D-manno-Heptulose D-Mannose DMAP