D(+)-Galactose from lactose (min. 98.0% HPLC)
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Shipment: not cooled. Store at +15°C to +30°C. For laboratory usage only!
Galactose is a monosaccharide. When combined with glucose (monosaccharide), through a condensation reaction, the result is the disaccharide lactose. The hydrolysis of lactose to glucose and galactose is catalyzed by the enzymes lactase and β-galactosidase. The latter is produced by the lac operon in Escherichia coli.
In nature, lactose is found primarily in milk and milk products. Consequently, various food products made with dairy-derived ingredients, e.g. breads and cereals, can contain lactose. Galactose metabolism, which converts galactose into glucose, is carried out by the three principal enzymes in a mechanism known as the Leloir pathway.
In the human body, glucose is changed into galactose via hexoneogenesis to enable the mammary glands to secrete lactose. However, most lactose in breast milk is synthesized from galactose taken up from the blood, and only 35±6% is made from galactose from de novo synthesis.
Specifications:
Assay: min. 98.0% (HPLC)
a20°C/D (10% in water): +78° - +81.5°
pH (10% in water): 5.0 - 7.0
Insoluble matter: corresponds
Water (K.F.): max. 0.3%
A (1cm/1M in water): at 260nm max. 0.05, at 280nm max. 0.05
Solubility (25°C): 680g/L (H2O)
MP = 167-170°C
Heavy metals (as Pb): max. 0.001%
C6H12O6
MW = 180.16 g/mol.
Sicherheits Hinweise / Safety
Klassifizierungen / Classification
EC-Nr: 200-416-4CAS-Nr: 59-23-4
eclass-Nr: 32-16-04-90
Documents:
Safety Data SheetCertificate
Category List
Source: NCBI PubMed
