The infrared technique showed that the condensed fraction from the pyrolysis of Acacia Mearncii contains mainly aliphatic, carbonyl and aromatic groups. Gas chromatography coupled with mass spectrometry enabled us to identify the major constituents of each type of condensate. We thus characterised the constituents of the condensable fraction of this wood obtained by pyrolysis in an inert atmosphere. In addition, by using Acacia Mearncii charcoal as a trap at the reactor outlet for the first time, we were able to obtain new chemical compounds of great industrial interest.