Surfaces of alumina powders from a variety of suppliers have been studied by recording Raman spectra in air by excitation of the powder surface with a 532 nm pulsed laser beam. The results of these studies, which were largely concerned with the amount and character of adsorbed H 2O and CO 2 on the “as received” materials, are presented. These powders are used in the manufacture of ceramic supports; however, the area of study also relates to catalytic activity of the powders. In particular, studies of benzene adsorbed on alumina which relates to bifunctional catalysts are also reported. Other studies of composite “green” materials used in manufacturing processes which include alumina are described. The current status of the surface Raman technique including features and limitations is discussed.