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Merck

61339

D-Lactose monohydrate

≥99% (HPLC), BioUltra

Synonim(y):

β-D-Gal-(1→4)-D-Glc, 4-O-β-D-Galactopyranosyl-D-glucose, Milk sugar

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25 G

327,00 zł

100 G

993,00 zł

250 G

1900,00 zł

327,00 zł

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Informacje o tej pozycji

Wzór empiryczny (zapis Hilla):
C12H22O11 · H2O
Numer CAS:
64044-51-5
Masa cząsteczkowa:
360.31
UNSPSC Code:
12352201
NACRES:
NA.25
PubChem Substance ID:
329759435
EC Number:
200-559-2
Beilstein/REAXYS Number:
3768231
MDL number:
MFCD00166994

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product line

BioUltra

Quality Level

100

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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Ta pozycja
L254PHR10241356701
D-Lactose monohydrate ≥99% (HPLC), BioUltra

Sigma-Aldrich

61339

D-Lactose monohydrate

D-Lactose monohydrate ACS reagent

Sigma-Aldrich

L254

D-Lactose monohydrate

Lactose (Monohydrate) Pharmaceutical Secondary Standard; Certified Reference Material

Supelco

PHR1024

Lactose (Monohydrate)

Lactose monohydrate United States Pharmacopeia (USP) Reference Standard

USP

1356701

Lactose monohydrate

assay

≥99% (HPLC)

assay

-

assay

-

assay

-

solubility

H2O: 0.5 M at 20 °C, clear, colorless

solubility

-

solubility

-

solubility

-

Quality Level

100

Quality Level

200

Quality Level

300

Quality Level

-

form

solid

form

powder

form

-

form

-

impurities

insoluble matter, passes filter test

impurities

dextrose, passes test, sucrose, passes test, ≤0.005% insolubles, 4.0-6.0% water

impurities

-

impurities

-

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

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

cation traces

-

cation traces

-

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

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

11 - Combustible Solids

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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Certyfikaty analizy (CoA)

Lot/Batch Number
BCCM7888
BCCN5189
BCCN5188
BCCL7381
BCCM4269

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Masz już ten produkt?

Dokumenty związane z niedawno zakupionymi produktami zostały zamieszczone w Bibliotece dokumentów.

Odwiedź Bibliotekę dokumentów

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)
Daniel Cavanagh et al.
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
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.
Journal of pharmaceutical sciences, 103(9), 2819-2828 (2014-03-04)
The objective of this study was to develop powder X-ray diffraction (XRPD) chemometric model for quantifying crystalline tacrolimus from solid dispersion (SD). Three SDs (amorphous tacrolimus component) with varying drug to excipient ratios (24.4%, 6.7%, and 4.3% drug) were prepared.
Cecilia Arahí Prato et al.
STAR protocols, 1(3), 100204-100204 (2020-12-31)
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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Numer pozycji handlu globalnego

SKUNUMER GTIN
61339-25G04061832699905
61339-250G04061832699899
61339-100G04061832699868

Questions

1–2 of 2 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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