Any aldehyde with two aldehyde groups.
| Member | Definition | Role |
|---|
| 2,5-diformylfuran | A member of the class of furans carrying two formyl substituents at positions 2 and 5. | 2,5-diformylfuran |
| botrydial | A cytotoxic fungal metabolite isolated from plant tissues infected by phytopathogen Botrytis cinerea. | botrydial |
| dolichodial | A dialdehyde that is cyclopentanecarbaldehyde substituted by a methyl group at position 2 and a 3-oxo-prop-1-en-2yl group at position 5. It has been found to occur in pheromones of insects such as aphids. | dolichodial |
| glutaral | A dialdehyde comprised of pentane with aldehyde functions at C-1 and C-5. | glutaraldehyde |
| glyoxal | The dialdehyde that is the smallest possible and which consists of ethane having oxo groups on both carbons. | glyoxal |
| malondialdehyde | A dialdehyde that is propane substituted by two oxo groups at the terminal carbon atoms respectively. A biomarker of oxidative damage to lipids caused by smoking, it exists in vivo mainly in the enol form. | malonaldehyde |
| o-phthalaldehyde | A dialdehyde in which two formyl groups are attached to adjacent carbon centres on a benzene ring. | phthalaldehyde |
| scalaradial | A scalarane sesterterpenoid with formula C27H40O4. It is a natural product found in the marine sponges Spongia officinalis and Cacospongia mollior, and exhibits anti-inflammatory activity. | scalaradial |