Synthesis, spectral characterization and antimicrobial activity of some new azo dyes derived from 4,6-dihydroxypyrimidine

► Preparation of some new azo disperse dyes derived from 4,6-dihydroxypyrimidine. ► Characterization and evaluation of solvathochromic properties. ► Effects of temperature and concentration. ► Antimicrobial activity were studied.