PHENOLPHTHALEIN DIPHOSPHATE, TETRACOLAMINE SALT 2-HYDROXYETHYLAMINE PHENOLPHTHALEIN DIPHOSPHATE COLAMINPHENOLPHTHALEIN PHOSPHATE, TETRACOLAMINE SALT Phenolphthalein Diphosphate,Tetracolamine Salt(1.24533) isobenzofuran-3,3-diylbis(p-phenyleno) hydrogen phosphate, compound with 2-aminoethanol (1:4) 1(3H)-Isobenzofuranone, 3,3-bis4-(phosphonooxy)phenyl-, compd. with 2-aminoethanol (1:4)