Marking mineral oil with basic dyestuff contg. at least 2 amino gps. - undergoes bathochromic shift and increase in extinction on adding protonic acid

摘要

Marked mineral oils are marked with basic dyestuffs (I) contg. at least 2 (substd) amino gps. which undergo a bathochromic shift in the absorption max. and increase in extinction on addn. of a protonic acid and opt. a Zn, Al or Sn halide. (I) are triarylmethane, xanthene or azo dyestuffs. -