C5H10O5

The molecular formula C5H10O5 may refer to:
 * Apiose
 * Aldopentoses
 * Arabinose
 * Lyxose
 * Ribose
 * Xylose
 * 1,2,3,4,5-Cyclopentanepentol
 * Ketopentoses
 * Ribulose
 * Xylulose