formaldehyde
CH2O
Formaldehyde has the molecular formula CH2O and a molar mass of 30.03 g/mol, a melting point of -92.2 °C and a boiling point of -21.1 °C.
Properties
| Molecular formula | CH2O |
|---|---|
| Molar mass | 30.026 g/mol |
| Exact (monoisotopic) mass | 30.01056 g/mol |
| Melting point | -92.22 °C |
| Boiling point | -21.11 °C |
| Density | 0.8153 g/cm³ |
| logP (octanol–water) | 1.2 |
| Topological polar surface area | 17.1 Ų |
| Hydrogen-bond donors / acceptors | 0 / 1 |
| Heavy atoms | 2 |
| InChIKey | WSFSSNUMVMOOMR-UHFFFAOYSA-N |
Elemental composition
4 atoms across 3 elements, by mass.
| Element | Atoms | Percent by mass |
|---|---|---|
| Oxygen (O) | 1 | 53.28% |
| Carbon (C) | 1 | 40.00% |
| Hydrogen (H) | 2 | 6.71% |
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Related compounds
Molar mass and elemental composition are computed from IUPAC 2021 conventional atomic weights. Formula, exact mass and the computed descriptors come from PubChem, which is US government work and in the public domain. Melting point, boiling point and density come from Wikidata under CC0. Properties with no figure shown are absent from those sources rather than zero.