All Photos(2)



α-Lactose monohydrate

≥99% total lactose basis (GC)

4-O-β-D-Galactopyranosyl-α-D-glucose, Milk sugar, β-D-Gal-(1→4)-α-D-Glc
Empirical Formula (Hill Notation):
C12H22O11 · H2O
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:

Quality Level

biological source

bovine milk


≥99% total lactose basis (GC)




≤0.05% Glucose
≤4% β-lactose

SMILES string




InChI key


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1 kg in poly bottle
5 kg in poly drum

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%.
alpha-Lactose is the primary sugar present in milk and the main energy source to a newborn mammalian through its mother′s milk. It is digested by the intestinal lactase (EC, an enzyme expressed in newborns. The enzyme′s activity declines following weaning which can lead to lactose intolerance in adult mammals.

Storage Class Code

13 - Non Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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