C1-12 alcohols, carboxylic acids and nitro compounds belong to the class of protic solvents. Hong et al. [237] have shown the CSP of low permittivity metaboric acid using ethanol as protic non aqueous solvent obtaining better results than by dry CSP. DMSO has been attempted with good results in the CSP of ZnO and MnO by Kang et al. [147].