CAS No 9005-80-5 , Inulin

Title: Inulin
CAS Registry Number: 9005-80-5
Synonyms: Dahlin; alantin; alant starch
Literature References: Mol wt approx 5000. Polysaccharide of Compositae which partially or completely replaces starch as a reserve food. Isoln from dahlia tubers: McDonald, "Polyfructosans and Difructose Anhydrides" in Advan. Carbohyd. Chem. vol. 2, 254 (1946); from Jerusalem artichoke tubers: Bacon, Edelman, Biochem. J. 48, 114 (1951). Structure: E. G. V. Percival, Structural Carbohydrate Chemistry (J. Garnet Miller, London, 2nd ed., 1962) p 274.
Properties: Spherical crystals from water. Hygroscopic in moist air. [a]D20 -40° (c = 2) for the anhydr. Sol in hot water; slightly sol in cold water and organic solvents. Yields D-fructose and D-glucose upon acid hydrolysis.
Optical Rotation: [a]D20 -40° (c = 2) for the anhydr
 
Derivative Type: Acetate
Properties: Fine powder from methanol. [a]D20 -34° (c = 1.5 in chloroform); [a]D20 -43° (c = 1.8 in acetic acid).
Optical Rotation: [a]D20 -34° (c = 1.5 in chloroform); [a]D20 -43° (c = 1.8 in acetic acid)
 
Derivative Type: Trimethylinulin
Properties: Powder from hot water + acetone, mp 140°. [a]D20 -55° (c = 1.03 in chloroform); [a]D20 -54° (c = 1.09 in benzene).
Melting point: mp 140°
Optical Rotation: [a]D20 -55° (c = 1.03 in chloroform); [a]D20 -54° (c = 1.09 in benzene)
 
Therap-Cat: Diagnostic aid (renal function).
Keywords: Diagnostic Aid.