formaldehyde

noun

1. (countable, uncountable)The simplest aldehyde, HCHO, a colourless gas that has many industrial applications; it dissolves in water to give formol (10%) and formalin.

   “The shark chosen to replace the original was injected with 224 gallons of formaldehyde, ten times the amount used on the first shark and in a stronger concentration.”

   “Back in 2006, Hirst found himself at the centre of a different debate arising out of the need to refurbish or update formaldehyde pieces that are prone to decay. It related to the piece that made him famous: the formaldehyde shark The Physical Impossibility of Death in the Mind of Someone Living (1991), which had been bought by the US hedge fund billionaire Steve Cohen for $8m.”