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61345 Sigma

D-Lactose monohydrate

≥98.0% (HPLC)

Synonym: β-D-Gal-(1→4)-D-Glc, 4-O-β-D-Galactopyranosyl-D-glucose, Milk sugar

  • CAS Number 64044-51-5

  • Empirical Formula (Hill Notation) C12H22O11 · H2O

  • Molecular Weight 360.31

  •  Beilstein Registry Number 3768231

  •  EC Number 200-559-2

  •  MDL number MFCD00166994

  •  PubChem Substance ID 329759439

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Properties

Related Categories Biochemicals and Reagents, Carbohydrate Chemistry, Carbohydrate Derivatives, Carbohydrates, Chemical Biology,
InChI Key   HBDJFVFTHLOSDW-XBLONOLSSA-N
assay   ≥98.0% (HPLC)
optical activity   [α]20/D +52±2°, 22 hr, c = 10% in H2O
solubility   H2O: soluble0.1 g/mL, clear, colorless (warm)

Description

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Biochem/physiol Actions

Lactose is a dissacharide formed by the condensation of one galactose and one glucose molecule. Lactose is the major sugar in the milk of most species, typically present between 2-8%. The enzyme lactase hydrolyzes lactose to its constituent monosaccharides. In neonates, glucose released via the action of lactase is a major energy source.

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