  We present measurements of multi-jet event properties, performed using
proton-proton collisions data recorded by the CMS experiment. The jet charge
and jet mass distributions are considered in addition to a measurement of the
azimuthal angular correlations in 2- and 3-jet events. The measurements are
compared to predictions including higher orders matched to parton shower and
hadronization, together with predictions from semi-analytical calculations
beyond next-to-leading logarithmic accuracy.
