Galactose

InChI=1S/C6H12O6/c7-1-2-3(8)4(9)5(10)6(11)12-2/h2-11H,1H2/t2−,3+,4+,5−,6+/m1/s1
Key: WQZGKKKJIJFFOK-PHYPRBDBSA-N
InChI=1/C6H12O6/c7-1-2-3(8)4(9)5(10)6(11)12-2/h2-11H,1H2/t2−,3+,4+,5−,6+/m1/s1
Key: WQZGKKKJIJFFOK-PHYPRBDBBU

SMILES

O[C@H]1[C@@H](O)[C@H](O[C@H](O)[C@@H]1O)CO

Properties

Chemical formula

C₆H₁₂O₆Molar mass180.156 g·mol Appearance White solid OdorOdorless Density1.5 g/cm Melting point168–170 °C (334–338 °F; 441–443 K)

Solubility in water

650 g/L (20 °C)

Magnetic susceptibility (χ)

−103.00·10 cm/mol Pharmacology

ATC code

V04CE01 (WHO) V08DA02 (WHO) (microparticles) Hazards NFPA 704 (fire diamond)

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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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Galactose (, + , sometimes abbreviated gal) is a common monosaccharide, i.e. a simple sugar. It is classified as a reducing hexose, more specifically an aldohexose. In terms of structure, it is a C-4 epimer of glucose. A white, water-soluble solid, it is about 80‍–‍90% as sweet as glucose and about 65% as sweet as sucrose.