Task: Text Categorization
Input (English): A 2000 study by P. F. Coogan, et al. states that this chemicalis found to be genotoxic and can bind to estrogen receptors. It is usually synthesized in the presence of zinc chloride or sulfuric acid by the condensation of its namesake (*) anhydride and phenol, and is closely related to triphenylmethane. One of its forms has a charge of negative three due to the removal of two extra hydrogen ions, and occurs only in solutions with pH greater than 12, and in solutions with pH less than 0, it appears orange. It was at one point used as a laxative, where it dyed feces pink. For 10 points, identify this indicator, which is colorless in acids and pink in bases.
Output (English): Science