Carbon black has been widely applied as electrical conductive or UV stabilizing agent in plastic, pigment in ink formulations and filler to reinforce polymer in various industries. Its industrial usage and applicability are mainly dependent on the surface properties and size of carbon black particle. This study investigates the surface chemical properties and electrochemical properties of two neutral and acidic carbon black which are commercially available through X-ray photoelectron spectroscopy(XPS) and ζ-potential measurements. In addition, the dispersibility of carbon black is also investigated by dynamic light scattering(DLS). The relationship between the electrochemical surface properties and aggregation behavior is discussed in term of the electrical repulsive interaction of the carbon black particles.