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61339

Sigma-Aldrich

D-Lactose monohydrate

BioUltra, ≥99% (HPLC)

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Synonym(s):
β-D-Gal-(1→4)-D-Glc, 4-O-β-D-Galactopyranosyl-D-glucose, Milk sugar
Empirical Formula (Hill Notation):
C12H22O11 · H2O
CAS Number:
Molecular Weight:
360.31
Beilstein/REAXYS Number:
3768231
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.25

product line

BioUltra

Quality Level

assay

≥99% (HPLC)

form

solid

optical activity

[α]20/D +53±1°, 22 hr, c = 10% in H2O

impurities

insoluble matter, passes filter test

ign. residue

≤0.05% (as SO4)

color

colorless

pH

3.5-6.0 (25 °C, 0.5 M in H2O)

solubility

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

λ

0.5 M in H2O

UV absorption

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

SMILES string

O.OC[C@@H](O)[C@@H](O[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O)[C@H](O)[C@@H](O)C=O

InChI

1S/C12H22O11.H2O/c13-1-4(16)7(18)11(5(17)2-14)23-12-10(21)9(20)8(19)6(3-15)22-12;/h1,4-12,14-21H,2-3H2;1H2/t4-,5+,6+,7+,8-,9-,10+,11+,12-;/m0./s1

InChI key

HBDJFVFTHLOSDW-XBLONOLSSA-N

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This Item
61341L254PHR1024
D-Lactose monohydrate BioUltra, ≥99% (HPLC)

61339

D-Lactose monohydrate

Premium Grade
D-Lactose monohydrate tested according to Ph. Eur.

61341

D-Lactose monohydrate

-
D-Lactose monohydrate ACS reagent

L254

D-Lactose monohydrate

-
Lactose (Monohydrate) Pharmaceutical Secondary Standard; Certified Reference Material

PHR1024

Lactose (Monohydrate)

-
Quality Level

100

Quality Level

200

Quality Level

200

Quality Level

300

solubility

H2O: 0.5 M at 20 °C, clear, colorless

solubility

-

solubility

-

solubility

-

form

solid

form

solid

form

powder

form

-

cation traces

Al: ≤5 mg/kg, Ba: ≤5 mg/kg, Ca: ≤10 mg/kg, Co: ≤5 mg/kg, Cu: ≤5 mg/kg, K: ≤50 mg/kg, Mg: ≤5 mg/kg, Mo: ≤5 mg/kg, Ni: ≤5 mg/kg, Sr: ≤5 mg/kg, As: ≤0.1 mg/kg, Cd: ≤5 mg/kg, Fe: ≤5 mg/kg, Mn: ≤5 mg/kg, Pb: ≤5 mg/kg, Bi: ≤5 mg/kg, Li: ≤5 mg/kg, Zn: ≤5 mg/kg, Cr: ≤5 mg/kg, Na: ≤50 mg/kg

cation traces

-

cation traces

Fe: ≤5 ppm, heavy metals: ≤5 ppm (by ICP)

cation traces

-

color

colorless

color

-

color

-

color

-

Application

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

To gain a comprehensive understanding of our extensive range of Disaccharides for your research, we encourage you to visit our Carbohydrates Category page.
Component of the liquid stationary phase in the GLC separation of nitroxylene and xylenol isomers
Sales restrictions may apply

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


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Ono, A.
Journal of Chromatography A, 197, 251-251 (1980)
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Applied and environmental microbiology, 81(12), 3961-3972 (2015-04-05)
Lactococcus lactis is predominantly associated with dairy fermentations, but evidence suggests that the domesticated organism originated from a plant niche. L. lactis possesses an unusual taxonomic structure whereby strain phenotypes and genotypes often do not correlate, which in turn has
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Galectins are soluble lectins that participate in many physiological and pathological functions. Since they can act extracellularly, the use of the recombinant protein is a recurrent strategy for studying their biological functions. Here, we provide a general protocol for the

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