Dear Wondimagegne Assefa Molla, though I am not notified by the correction of this simple mistake, I suggest to go through these two RG links and the paper below. For me azo-dyes are most likely to be suitable. My Regards
JezakumAllah, Abdelkader BOUAZIZ . I saw all the papers you suggested to me thanks a lot. I do not know my question maybe strange, still, I did not find. What I need is dyes that are produced by using organic solvent. Even if the Mw of disprerse red 19 and disperse orange 3 are low, in their preparation methol is used.