Man-made surfactants are used in a wide range of domestic and industrial products and processes. In addition to detergents and personal care products, surfactants have found uses in almost every branch of chemical industry as well as in several other industries. The present work deals with the synthesis of copper soap (laurate), and its complex with benzothiazole for comparative studies. Spectral studies (IR, NMR, Mass and ESR), elemental analysis have been carried out to understand the structural insight of the complex synthesized. In order to understand their biological aspects with special reference to fungicidal activities, Alternaria alternata and Aspergillus nigerat different concentrations by P.D.A. technique. The present research work consist of detailed thermal analysis using TGA technique to determine their kinetic and thermodynamic parameters by applying various equations like Freeman Carroll, Coats-Redfern, Horowitz-Metzger, and Broido equation. Thermal degradation of solid components will be a good and significant method for the removal of the pollutant (laurate) from the environment. The present study will play an important role in the field of environmental chemistry and biochemistry.