Galactose
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Galactose

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Galactose (, galacto- + -ose, 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.

* Calculated from Wikipedia data.
Accuracy is not guaranteed.

d-Galactose
Haworth projection of
β-d-galactopyranose
Fischer projection of
d-galactose
Names
IUPAC names
Galactose
galacto-Hexose
Systematic IUPAC name
(2R,3S,4S,5R,6)-2,3,4,5,6-Pentahydroxyhexanal
Other names
Brain sugar
Identifiers
3D model (JSmol)
1724619
ChEBI
ChEMBL
ChemSpider
KEGG
MeSH Galactose
UNII
  • 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
  • O[C@H]1[C@@H](O)[C@H](O[C@H](O)[C@@H]1O)CO
Properties
C6H12O6
Molar mass 180.156 g·mol
Appearance White solid
Odor Odorless
Density 1.5 g/cm
Melting point 168–170 °C (334–338 °F; 441–443 K)
650 g/L (20 °C)
−103.00·10 cm/mol
Pharmacology
V04CE01 (WHO) V08DA02 (WHO) (microparticles)
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
0
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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