Aim To explore the concentration range of organic solvent which can both effectively increase solubility of the difficult soluble medicine monomer,and have low toxicity to cells,and to clarify the influence of different concentration of ethanol on curcumol efficacy.Methods Different DMSO and ethanol concentrations were diluted in culture medium and incubated with cells A549,NCI-H460,NCI-H1299,NCI-1650,LTEP-a2 and SPC-A1 for 12 h,24 h,or 48 h,cell viability was tested by a colorimetric assay with 3-( 4,5-dim...