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D-Galactose

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D-Galactose Basic information
D-Galactose Chemical Properties
  • Melting point:168-170 °C(lit.)
  • alpha +79.0~+81.0°(D/20℃) (c=10, dil. NH4OH)
  • Boiling point:232.96°C (rough estimate)
  • Density 1,5 g/cm3
  • refractive index 80 ° (C=10, H2O)
  • storage temp. Store at RT.
  • solubility H2O: 100 mg/mL
  • form powder
  • pkapK1:12.35 (25°C)
  • color White
  • PH4.5-6.0 (H2O)Aqueous solution
  • PH Range5 - 7 at 180 g/l at 25 °C
  • OdorOdorless
  • optical activity[α]20/D +80±1°, 24 hr, c = 5% in H2O
  • Water Solubility Soluble in water.
  • Merck 14,4335
  • BRN 1724619
  • InChIKeyGZCGUPFRVQAUEE-DPYQTVNSSA-N
  • CAS DataBase Reference59-23-4(CAS DataBase Reference)
  • NIST Chemistry ReferenceD-Galactose(59-23-4)
  • EPA Substance Registry SystemD-Galactose (59-23-4)
Safety Information
MSDS
D-Galactose Usage And Synthesis
  • Chemical PropertiesWhite powder
  • UsesA C-4 epimer of Glucose (G595000) found in milk and sugar beets as well as being synthesized by the body. Potential use in oral therapy for nephrotic syndrome in focal and segmental glomerulosclerosis.
  • UsesThe C-4 epimer of glucose.
  • DefinitionA monosaccharide commonly occurring in milk sugar or lactose.
  • Purification Methods-D-Galactose is crystallised twice from aqueous 80% EtOH at -10o, then dried in a vacuum oven at 90o over P2O5 for 10hours. [Link Biochemical Preparations 3 75 1953, Hansen et al. Biochemical Preparations 4 2 1955.] Also purify it by recrystallising the dried solid (150g) in hot H2O (150mL), then adding hot MeOH (250mL) and hot EtOH (500mL), stirring to mix, filtering through a bed of charcoal, and the clear filtrate is stirred to initiate crystallisation. After standing overnight at 10o, the crystals of the -anomer are filtered off by suction, washed with MeOH, then EtOH, and dried (yield 130g), and more can be obtained by evaporation of the filtrate and washing as before. [Wolfrom & Thompson Methods in Carbohydrate Chemistry I 120 1962, Academic Press, Beilstein 1 IV 4336.]
D-Galactose Preparation Products And Raw materials
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