For 10 points, name this acid base indicator that at pH nine point two turns into a distinctive magenta-pink color.
The oxidation of hemoglobin is involved in the Kaiser-Meyer test of this compound, whose synthesis from phthalic anhydride was discovered by Adolf Baeyer. One form of this compound only absorbs ultraviolet light while another form of this compound with full delocalization absorbs both ultraviolet and visible light at five hundred fifty-three nanometers. That modified, deprotonated form of this compound absorbs light in the green region of the spectrum and is visible at a higher pH than compounds like thymol blue or methyl red. For 10 points, name this acid base indicator that at pH nine point two turns into a distinctive magenta-pink color.
The oxidation of hemoglobin is involved in the Kaiser-Meyer test of this compound, whose synthesis from phthalic anhydride was discovered by Adolf Baeyer.
{phenolphthalein}