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SummarySome of the most commonly employed carbon blacks (Carbograph 1, 2, 4, 5 from Lara and Carbopack X from Supelco), were evaluated by the BET surface characterization method for pore size distribution, porosity and specific surface. This information is often incomplete as furnished by manufacturers and is needed for a deeper understanding of carbon adsorption properties in chromatography.The data on surface characterization were obtained before and after graphitisation treatment (except for Carbopack X which cou Id not be obtained in non-graphitized form). The natu re of the active sites present on these carbons was investigated by BETanalysis, atomic absorption and FT-IR.