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D-Lactose monohydrate

BioUltra, ≥99.5% (HPLC)

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

product line


Quality Level


≥99.5% (HPLC)



optical activity

[α]20/D +53±1°, 22 hr, c = 10% in H2O


insoluble matter, passes filter test

ign. residue

≤0.05% (as SO4)


3.5-6.0 (25 °C, 0.5 M in H2O)


H2O: 0.5 M at 20 °C, clear, colorless

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤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


0.5 M in H2O

UV absorption

λ: 260 nm Amax: 0.02
λ: 280 nm Amax: 0.02

SMILES string




InChI key


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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

Sales restrictions may apply
Component of the liquid stationary phase in the GLC separation of nitroxylene and xylenol isomers

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

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

More Documents

Quotes and Ordering

Separation behaviour of some isomeric organic compounds on sugars, sugar alcohols and their mixed phases by gas-liquid chromatography.
Ono, A.
Journal of Chromatography A, 197, 251-251 (1980)
Fan Zhou et al.
Scientific reports, 1, 78-78 (2012-02-23)
The invisibility cloak has been a long-standing dream for many researchers over the decades. Using transformation optics, a three-dimensional (3D) object is perceived as having a reduced number of dimensions, making it "undetectable" judging from the scattered field12345. Despite successful
J Nijdam et al.
Colloids and surfaces. B, Biointerfaces, 123, 53-60 (2014-09-30)
Segregation of the protein bovine serum albumin (BSA) and lactose in thin aqueous films during drying was investigated by examining the composition of the dried films using inverse micro Raman spectroscopy (IMRS) and X-ray photoelectron spectroscopy (XPS) sputter-depth profiling. The
Akhtar Siddiqui et al.
International journal of pharmaceutics, 493(1-2), 1-6 (2015-07-26)
The objective of this study was to develop and validate XRPD analytical method for the estimation of percent crystalline warfarin sodium present in drug products. Warfarin sodium (WS) is a clathrate containing Isopropyl alcohol entrapped in the crystalline structure. Four
Pramod K Mistry et al.
JAMA, 313(7), 695-706 (2015-02-18)
Gaucher disease type 1 is characterized by hepatosplenomegaly, anemia, thrombocytopenia, and skeletal disease. A safe, effective oral therapy is needed. To determine whether eliglustat, a novel oral substrate reduction therapy, safely reverses clinical manifestations in untreated adults with Gaucher disease

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