Disodium tetracarbonylferrate is the organoiron compound with the formula Na2[Fe(CO)4].

[1] An oxygen-sensitive colourless solid, it is a reagent in organometallic and organic chemical research.

The reagent was originally generated in situ by reducing iron pentacarbonyl with sodium amalgam.

[8] The reagent was originally described for the conversion of primary alkyl bromides to the corresponding aldehydes in a two-step, "one-pot" reaction:[5] This solution is then treated sequentially with PPh3 and then acetic acid to give the aldehyde, RCHO.

Disodium tetracarbonylferrate can be used to convert acyl chlorides to aldehydes.