In the medium of dilute H 2SO 4, the fading reaction of pyrogallol red is oxdized by H 2O 2, which can be catalyzed by Zn 2+ has been studied.

• 研究了在稀H2 SO4介质中 ,Zn2 + 催化H2 O2 氧化邻苯三酚红的褪色反应。