For 10 points, identify this crystalline organic compound with formula C20 H14 O4, an indicator which turns red above a pH of 9.6.
A derivative of phthalic anhydride, this compound was freqently used in laxatives until it was discovered that it might be carcinogenic.  It is insoluble in water but soluble in most basic solutions or acetone, and for its primary use is most frequently found in a 1% alcohol solution.  For 10 points, identify this crystalline organic compound with formula C20 H14 O4, an indicator which turns red above a pH of 9.6.
A derivative of phthalic anhydride, this compound was freqently used in laxatives until it was discovered that it might be carcinogenic.  
phenolphthalein