Sugar acid

A sugar acid or acidic sugar is a monosaccharide with a carboxyl group at one end or both ends of its chain.

Main classes of sugar acids include:

Aldonic acids, in which the aldehyde group (−CHO) located at the initial end (position 1) of an aldose is oxidized.
Ulosonic acids, in which the −CH₂(OH) group at the initial end of a 2-ketose is oxidized creating an α-ketoacid.
Uronic acids, in which the −CH₂(OH) group at the terminal end of an aldose or ketose is oxidized.
Aldaric acids, in which both ends (−CHO and −CH₂(OH)) of an aldose are oxidized.

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