Fumaric acid (also called trans-Butenedioic acid, Allomaleic acid) has the formula C4H4O4 and a molar mass of 116.07 g/mol. The model above is PubChem's computed 3D conformer: drag to rotate, scroll to zoom, and use the measurement tools to read bond lengths and angles.
Explore in 3D Space-filling model PubChem
| IUPAC name | (E)-but-2-enedioic acid |
|---|---|
| SMILES | C(=C/C(=O)O)\C(=O)O |
| PubChem CID | 444972 |
| Other names | trans-Butenedioic acid, Allomaleic acid, Lichenic acid, Boletic acid, Tumaric acid |
Atoms use the standard CPK colors: carbon gray, hydrogen white, oxygen red, nitrogen blue, sulfur yellow. Switch to Spacefill to see the molecule's overall shape and size, or Stick for a clear view of the bonds. Click two atoms in distance mode to measure a bond length in ångströms.
3D coordinates are PubChem's computed conformer, one low-energy shape of the molecule. Flexible molecules can take many other shapes.