It is expected that the results obtained within ATMO-SOS project will provide a clear assessment of atmospheric impacts of these VOCs emitted from newly proposed “clean” solvents. With the results obtained within this project we expect to gain insight in the chemical view of the gas-phase products distribution and nucleation mechanisms by identifying key products in the gas-phase and particle formation processes of the all investigated proposed compounds, and to understanding the role of important atmospheric contaminants in the atmospheric degradation of clean organic solvents. In fact, the ATMO-SOS project is the first of its kind to aim to investigate the atmospheric behavior of a series of clean organic solvents at least at national level.