A viscous, colorless liquid that has a pleasant aromatic odor; upon exposure to air it turns dark brown or black. Furfural is the aldehyde of pyromucic acid; it has properties similar to those of benzaldehyde.
A viscous, colorless liquid that has a pleasant aromatic odor; upon exposure to air it turns dark brown or black. Furfural is the aldehyde of pyromucic acid; it has properties similar to those of benzaldehyde.