β-lactose

Also known as beta-D-Galp-(1->4)-beta-D-Glcp, 4-O-beta-D-galactopyranosyl-beta-D-glucopyranose, Galbeta1-4Glcbeta, Galb1-4Glcb, lactose

Lactose is a disaccharide composed of galactose and glucose and has the molecular formula C12H22O11. Lactose makes up around 2–8% of milk (by mass). The name comes from (gen. ), the Latin word for milk, plus the suffix -ose used to name sugars. The compound is a white, water-soluble, non-hygroscopic solid with a mildly sweet taste. It is used in the food industry.

AI overview

β-lactose is a form of the sugar lactose, a naturally occurring compound found in milk that is composed of two simpler sugars (galactose and glucose). It is widely used in food manufacturing and has practical value due to its properties as a white, water-soluble solid with a mild sweetness.

AI-generated from the Wikipedia summary — may contain errors.

Chemical data

Formula: C12H22O11
Molecular weight: 342.3 g/mol
IUPAC name: (2R,3R,4S,5R,6S)-2-(hydroxymethyl)-6-[(2R,3S,4R,5R,6R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxane-3,4,5-triol
SMILES: C([C@@H]1[C@@H]([C@@H]([C@H]([C@@H](O1)O[C@@H]2[C@H](O[C@H]([C@@H]([C@H]2O)O)O)CO)O)O)O)O
InChIKey: GUBGYTABKSRVRQ-DCSYEGIMSA-N
XLogP: -4.7
Polar surface area: 190 Å²
H-bond donors: 8
H-bond acceptors: 11
Formal charge: 0

via PubChem

Wikidata facts

Mass: 342.116

Show 5 more facts

Commons gallery: Lactose
Commons category: Lactose
chemical formula: C₁₂H₂₂O₁₁
canonical SMILES: C(C1C(C(C(C(O1)OC2C(OC(C(C2O)O)O)CO)O)O)O)O
isomeric SMILES: C([C@@H]1[C@@H]([C@@H]([C@H]([C@@H](O1)O[C@@H]2[C@H](O[C@H]([C@@H]([C@H]2O)O)O)CO)O)O)O)O

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Article

9 sections

Contents

Structure and reactions
Occurrence and isolation
Metabolism
Biological properties
Applications
History
See also
References
External links

{{Chembox | Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 477497006 | Name = Lactose | ImageFile_Ref = | ImageFile = Beta-D-Lactose.svg | ImageSize = 200px | ImageClass = skin-invert-image | IUPACName = β--Galactopyranosyl-(1→4)-α--glucopyranose 4-O-β--Galactopyranosyl-α--glucopyranose | SystematicName = (2R,3R,4S,5R,6S)-2-(Hydroxymethyl)-6-{[(2R,3S,4R,5R,6R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy}oxane-3,4,5-triol | OtherNames = Milk sugarLactobiose4-O-β-D-Galactopyranosyl-D-glucose | Section1 = | Section2 = | Section4 = | Section7 = }}