D-galactose CAS 59-23-4 is a type of D-hexaldose obtained by hydrolysis of lactose, with the chemical formula C6H12O6. The appearance is white crystal or crystalline powder, without special odor, soluble in water and pyridine, with a solubility of 680 g/L (25 ° C) in water; Slightly soluble in glycerol and alcohol. D-galactose is a component of sugars such as agar, plant gum, mucus, and raffinose, lactose, and melibiose. It exists in animal materials such as snail protein glands, frog eggs, and brain nerve tissue as molecules of galactoside and galactose. Free state can be found in milk. It combines with glucose to form lactose. After oxidation with nitric acid, mucus acid can be obtained.

Chinese name: D-galactose

Foreign name: D-Galactose; D-cerebrose; D-Gal; α- D-Galactopyranose

Chemical formula: C6H12O6

Molecular weight: 180.156

CAS login number: 59-23-4

EINECS login number: 200-416-4

Melting point: 165 to 168 ℃

Water solubility: 680 g/L (25 ℃)

Appearance: White crystal or crystalline powder, without special odor

Physical and chemical properties

Galactose is a monosaccharide composed of six carbons and one aldehyde, classified as aldose and hexose. D-galactose and L-galactose are naturally present. D-galactose generally exists as a structural part of lactose in milk, and the lactose in milk is broken down by the human body into glucose and galactose is absorbed and utilized.

Rotation:+78.5 ° -81.0 °

The melting point of monohydrate is 118~120 ℃.

Quality specifications

Content: ≥ 98%

Loss on drying: ≤ 0.5%

Residue: ≤ 0.5%

Chloride: ≤ 0.003%

Sulfate: ≤ 0.005%

Heavy metal: ≤ 0.001%

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