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Succinonitrile, also butanedinitrile, is a nitrile, with the formula of C₂H₄(CN)₂. It is an odorless, colorless to light brown crystal or colourless waxy solid which melts at 58 °C.

Succinonitrile is produced by the addition of hydrogen cyanide to acrylonitrile (hydrocyanation):
:CH₂=CHCN

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