Xylonic acid is a colorless, water-soluble solid.

Several isomers are known, all being classified as sugar acids, several of which can be obtained by oxidation of the corresponding pentoses.

Genetically engineered Pseudomonas fragi converts D-xylose to D-xylonic acid.

Decarboxylation of the xylonic acid by a strain of Escherichia coli give [[1,2,4-Butanetriol|1,2,4-butanetriol], which is of commercial interest.

This article about an organic compound is a stub.