C5H6O5

C5H6O5 is the molecular formula representing five carbon atoms, six hydrogen atoms, and five oxygen atoms. Because several different arrangements of these atoms can yield the same formula, C5H6O5 does not identify a single compound; it denotes a set of possible structural isomers.

The formula implies a degree of unsaturation of three, indicating that the actual structures may include rings or multiple bonds. Structural possibilities commonly associated with this composition include carboxyl-containing derivatives such as esters or carboxylic acids with multiple carbonyl groups, lactones, and other oxygen-rich cyclic or acyclic frameworks. The exact physical and chemical properties depend on the specific arrangement of atoms and functional groups.

The molar mass of C5H6O5 is about 146.10 g/mol. To determine the identity of a particular compound with this formula, structural descriptors such as SMILES or InChI, along with spectroscopic data (NMR, IR, MS), are required to differentiate among isomers.

Because many isomers share this formula, C5H6O5 is primarily a descriptive or database-oriented designation rather than a unique chemical name. It is used to classify and discuss potential structures, to compare isomeric candidates, and to guide synthetic or analytical work in organic chemistry.