Molecular formulae indicate the simple numbers of each type of atom in a molecule of a molecular substance.
| Type | datatype |
| Wikidata property | P274 |
| Regular expression | ([αβγδφωλμπ]-)?([([]*[A-Z☐][ub]?[a-z]?[₁₂₃₄₅₆₇₈₉₀.]*(\)?[¹²³⁴⁵⁶⁷⁸⁹⁰]*[⁺⁻]?)?[\])|,₁₂₃₄₅₆₇₈₉₀]*(·\(?[-0-9.]*n?\)?)?)+ |
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