61339

D-Lactose monohydrate

≥99% (HPLC), BioUltra

• Synonym(s): β-D-Gal-(1→4)-D-Glc, 4-O-β-D-Galactopyranosyl-D-glucose, Milk sugar
• Empirical Formula (Hill Notation): C₁₂H₂₂O₁₁ · H₂O
• CAS Number: 64044-51-5
• Molecular Weight: 360.31
• Beilstein/REAXYS Number: 3768231
• EC Number: 200-559-2
• MDL number: MFCD00166994
• UNSPSC Code: 12352201
• PubChem Substance ID: 329759435
• NACRES: NA.25

Properties

• product line: BioUltra
• Quality Level: 100
• assay: ≥99% (HPLC)
• form: solid
• optical activity: [α]20/D +53±1°, 22 hr, c = 10% in H₂O
• impurities: insoluble matter, passes filter test
• ign. residue: ≤0.05% (as SO₄)
• color: colorless
• pH: 3.5-6.0 (25 °C, 0.5 M in H₂O)
• solubility: H₂O: 0.5 M at 20 °C, clear, colorless
• anion traces: chloride (Cl^-): ≤50 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg
• cation traces: Al: ≤5 mg/kg; As: ≤0.1 mg/kg; Ba: ≤5 mg/kg; Bi: ≤5 mg/kg; Ca: ≤10 mg/kg; Cd: ≤5 mg/kg; Co: ≤5 mg/kg; Cr: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤5 mg/kg; K: ≤50 mg/kg; Li: ≤5 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Mo: ≤5 mg/kg; Na: ≤50 mg/kg; Ni: ≤5 mg/kg; Pb: ≤5 mg/kg; Sr: ≤5 mg/kg; Zn: ≤5 mg/kg
• λ: 0.5 M in H₂O
• UV absorption: λ: 260 nm A_max: 0.02; λ: 280 nm A_max: 0.02
• SMILES string: O.OC[C@@H](O)[C@@H](O[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O)[C@H](O)[C@@H](O)C=O
• InChI: 1S/C12H22O11.H2O/c13-1-4(16)7(18)11(5(17)2-14)23-12-10(21)9(20)8(19)6(3-15)22-12;/h1,4-12,14-21H,2-3H2;1H2/t4-,5+,6+,7+,8-,9-,10+,11+,12-;/m0./s1
• InChI key: HBDJFVFTHLOSDW-XBLONOLSSA-N

Description

Application

D-Lactose is a disaccharide of D-glucose and D-galactose units found as a major sugar in milk. D-Lactose is used for the culture of lactic acid metabolizing bacteria, lactic acid bacteria. D-Lactose is used to identify and characterized galectins.

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.

Other Notes

To gain a comprehensive understanding of our extensive range of Disaccharides for your research, we encourage you to visit our Carbohydrates Category page.

Component of the liquid stationary phase in the GLC separation of nitroxylene and xylenol isomers

Sales restrictions may apply

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Gloves, type N95 (US)