Galactose Formula

What Is Galactose?

Galactose is a simple sugar belonging to simple carbohydrates which occurs in D-form in lactose. Charles Weissman coined the word galactose which is derived from the Greek word galaktos meaning milk and for sugars ose is used. It is an odourless white solid.

What Is The Formula Of Galactose?

The molecular formula of galactose is C6H12O6. Galactose is a monosaccharide and epimer of glucose. The property values of hydrogen bond donor and hydrogen bond acceptor are 5 and 6 respectively.

Structure Of Galactose

Galactose can exist in open-chain as well as cyclic form. The chain form of galactose has a similar pattern like glucose.

Cyclic Form Galactose Structure


Open-Chain Form Galactose Structure

Properties Of Galactose

IUPAC name (3R,4S,5R,6R)-6-(hydroxymethyl)oxane-2,3,4,5-tetrol
Molecular formula C6H12O6
Molecular mass 180.156 g/mol
Density 1.5
Melting point 168-170℃

The other interesting facts about galactose are:

  • Most of the galactose ingested by humans gets converted to glucose.
  • Galactose binds to glucose to make lactose, to lipids to make glycolipids and to proteins to make glycoproteins.

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