Ketose

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Fructose, an example of a ketose. The ketone group is the double-
bonded oxygen.

A ketose is a sugar containing one ketone group per molecule.

With 3 carbon atoms, dihydroxyacetone is the simplest of all ketoses and is the only one having no optical activity.

List of ketoses

• Trioses: dihydroxyacetone
• Tetroses: erythrulose
• Pentoses: ribulose, xylulose
• Hexoses: fructose, psicose, sorbose, tagatose

Qualitative reaction

General qualitative reaction for ketoses is Seliwanoff's test.

See also

• Aldose

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