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(+)-Lactose

C₁₂H₂₂O₁₁ · 45 atoms

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(+)-Lactose

Elements

About

Lactose is a glycosylglucose disaccharide, found most notably in milk, that consists of D-galactose and D-glucose fragments bonded through a beta-14 glycosidic linkage. The glucose fragment can be in either the alpha- or beta-pyranose form, whereas the galactose fragment can only have the beta-pyranose form. It has a role as a human metabolite.

Properties

IUPAC name(2R,3R,4S,5R,6S)-2-(hydroxymethyl)-6-[(2R,3S,4R,5R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxane-3,4,5-triol

CAS number63-42-3

Molar mass342.3 g/mol

Melting point222.8 °C

Sources

Properties: PubChem CID 440995
3D structure: PubChem CID 440995 (3D conformer)
CAS number: PubChem CID 440995
Description: PubChem ← ChEBI
Melting point: PubChem ← CAMEO Chemicals

Data from PubChem (NIH/NLM). Some annotations originate with the upstream sources shown.