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A monosaccharide that combines with glucose to form lactose. White crystal. Crystallization from aqueous solution contains a molecule of crystalline water. Melting point 118-120 ℃. When crystallized from ethanol solution, it becomes anhydrous. Melting point 165-168 ℃. Soluble in water and ethanol. Slightly soluble in glycerol. It has right optical rotation

It can be used for organic synthesis and determination of liver function in medicine

Synonyms:D-Galactose, CP;D-(+)-Galactose ;D(+)-Galactose, extra pure, Ph Ned, Ph Helv;Galactose (200 mg);D-Galactose, D-(+)-Galactose;D(+)-GALACTOSE ANHYDROUS CELL CULTURE*TE STED;D(+)-GALACTOSE, FOR BIOTECHNOLOGICAL PUR POSES;D-(+)-GALACTOSE, BIOTECH

CAS:59-23-4

MF:C6H12O6

MW:180.16

EINECS:200-416-4

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D-Galactose Chemical Properties

Melting point 168-170 °C(lit.)

alpha +79.0～+81.0°(D/20℃) (c=10, dil. NH4OH)

Boiling point:232.96°C (rough estimate)

density:1,5 g/cm3

refractive index:80 ° (C=10, H2O)

storage temp. Store at RT.

solubility H2O: 100 mg/mL

form powder

pkapK1:12.35 (25°C)

color:White

PH:4.5-6.0 (H2O)Aqueous solution

PH Range:5 - 7 at 180 g/l at 25 °C

OdorOdorless

optical activity[α]20/D +80±1°, 24 hr, c = 5% in H2O

Water Solubility Soluble in water.

Merck:14,4335

BRN:1724619

InChIKey:GZCGUPFRVQAUEE-DPYQTVNSSA-N

CAS DataBase Reference:59-23-4(CAS DataBase Reference)

NIST Chemistry Reference:D-Galactose(59-23-4)

EPA Substance Registry System:D-Galactose (59-23-4)

Safety Information

Hazard Codes Xi

Risk Statements 36/37/38

Safety Statements 22-24/25-36/37/39-27-26

WGK Germany 3

RTECS LW5490000

F 3

TSCA Yes

HS Code 29400090

D-Galactose Usage And Synthesis

Chemical PropertiesWhite powder

Uses:A C-4 epimer of Glucose (G595000) found in milk and sugar beets as well as being synthesized by the body. Potential use in oral therapy for nephrotic syndrome in focal and segmental glomerulosclerosis.

Uses:The C-4 epimer of glucose.

Definition:A monosaccharide commonly occurring in milk sugar or lactose.

Purification Methods-D-Galactose is crystallised twice from aqueous 80% EtOH at -10o, then dried in a vacuum oven at 90o over P2O5 for 10hours. [Link Biochemical Preparations 3 75 1953, Hansen et al. Biochemical Preparations 4 2 1955.] Also purify it by recrystallising the dried solid (150g) in hot H2O (150mL), then adding hot MeOH (250mL) and hot EtOH (500mL), stirring to mix, filtering through a bed of charcoal, and the clear filtrate is stirred to initiate crystallisation. After standing overnight at 10o, the crystals of the -anomer are filtered off by suction, washed with MeOH, then EtOH, and dried (yield 130g), and more can be obtained by evaporation of the filtrate and washing as before. [Wolfrom & Thompson Methods in Carbohydrate Chemistry I 120 1962, Academic Press, Beilstein 1 IV 4336.]