Succinaldehyde or succindialdehyde is an organic compound with the formula (C2H4(CHO)2.

[2] Typical of some other saturated dialdehydes, succinaldehyde is handled as the hydrates or methanol-derived acetal.

[3] Succinaldehyde can be used as a crosslinking agent for proteins, but it is less widely used than the related dialdehyde glutaraldehyde.

Oxidation of 2,5-dimethoxytetrahydrofuran with hydrogen peroxide is yet another route to succinaldehyde.

[2] In the presence of water, succinaldehyde converts to the cyclic hydrate.