To add an article to this category, please use {{Molecular formula index}}.

Pages in this category are normally organic compounds, and are arranged overall in order of increasing numbers of carbon atoms:

Within groups having the same carbon count, the order is fairly intuitive, but the following exceptions have been noted:

• C₂H₅N₃O₂ precedes C₂H₅NO₂
• C₂H₆O₄S precedes C₂H₆OS

This always pops up when only one atom of a kind is present: that entry will appear at the bottom of the list below all the others. For the same reason you will find C10H.... preceding C2H..... .

The situation arises as the sorting algorithm is based on the ASCII code of letters and numbers. As numbers have lower codes than letters, this counterintuitive situation arises.