Abstract: A cleaning solvent made up of blends of propionate esters. Propionate esters selected from the group methyl propionate, butyl propionate, propyl propionate and higher homologues, are blended with esters selected from the group methyl hydroxypropionate, ethyl hydroxypropionate and higher homologues. Blends of these esters produces cleaning effectiveness and low toxicity.The mixtures are particularly useful in electronic parts cleaning and defluxing, and for degreasing. The blending of the propionate solvents produces a selective range of evaporation rates and Flash Points.