thymolphthalein


thymolphthalein

[¦thī‚mȯl¦thā‚lēn] (organic chemistry) C6H4COOC[C6H2(CH3)(OH)CH(CH3)2]2 A white powder insoluble in water, soluble in alcohol and acetone, melts at 245°C; used in medicine and as an acid-base titration indicator.