.beta.-D-Galactopyranose

Product Name: .beta.-D-Galactopyranose
CAS No.: 7296-64-2
Chemical Name: .beta.-D-Galactopyranose
Synonyms: β-D-Galactose;-β-D-Galactose;β-D-galactopyranose;.beta.-D-Galactopyranose;(2R,3R,4S,5S,6R)-6-(hydroxymethyl)oxane-2,3,4,5-tetrol;(2R,3R,4S,5R,6R)-6-(hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol
CBNumber: CB31208989
Molecular Formula: C6H12O6
Formula Weight: 180.16
MOL File: 7296-64-2.mol

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.beta.-D-Galactopyranose Property

Melting point:: 179-179.5 °C
Boiling point:: 410.8±45.0 °C(Predicted)
Density: 1.732±0.06 g/cm3(Predicted)
storage temp.: Hygroscopic, Refrigerator, under inert atmosphere
solubility: Water (Slightly)
form: Solid
pka: 12.12±0.70(Predicted)
color: White to Off-White
Stability:: Hygroscopic

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Hazard and Precautionary Statements (GHS)

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N-Bromosuccinimide Price

TRC

Product number: G155265
Product name: β-D-Galactose
Packaging: 50mg
Price: $1070
Updated: 2021/12/16

American Custom Chemicals Corporation

Product number: CRB0002393
Product name: BETA-D-GALACTOPYRANOSE
Purity: 95.00%
Packaging: 5MG
Price: $500.31
Updated: 2021/12/16

Medical Isotopes, Inc.

Product number: 58346
Product name: β-D-Galactose
Packaging: 5mg
Price: $610
Updated: 2021/12/16

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.beta.-D-Galactopyranose Chemical Properties,Usage,Production

Uses

β-D-Galactose s the beta anomer of D-Galactose (G155250), the C-4 epimer of Glucose (G595000). D-Galactose is found in milk and sugar beets as well as being synthesized by the body.

Definition

ChEBI: A D-galactopyranose having beta-configuration at the anomeric centre.

Purification Methods

D-Galactose (40g) is dissolved in hot H2O to establish the equilibrium of and anomers; then the solution is cooled to 0o and poured into absolute EtOH (500mL). Stir vigorously and crystallisation occurs within a few minutes, and more rapidly if seeded, filter the crystals immediately (7g, [] D 20 +65o (initial, c 4 in H2O). This mixture of and anomers is further separated by dissolving in an equal weight of cold H2O, filtering and adding to ice cold absolute EtOH (250mL) and stirring for 1minute when crystals separate, then filter them off. After two such crystallisations, the initial [] D 20 is +53o. This can be further purified by shaking with 80% EtOH for 2minutes, filtering, washing with EtOH and Et2O, and drying in a vacuum desiccator to give -Dgalactose (15g) with m 167o, [ ] D 20 +52o (initial, c 4 in H2O) mutarotating to +80.4o. Acetylation of Dgalactose with hot NaOAc/Ac2O gives -D-galactopyranoside pentaacetate m 1 4 2o, [ ] D 25 +25 (c 4 in CHCl3). [Wolfrom & Thompson Methods in Carbohydrate Chemistry I 120 1962, Academic Press, Beilstein 1 IV 4336.]

.beta.-D-Galactopyranose Preparation Products And Raw materials

Raw materials

Preparation Products

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7296-64-2, .beta.-D-GalactopyranoseRelated Search:

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.beta.-D-Galactopyranose

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7296-64-2

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