PHENOLPHTHALEIN DISODIUM SALT PHENOLPHTHALEIN SODIUM SALT 3 3-BIS(P-HYDROXYPHENYL)PHTHALIDE DISODIUM SALT DISODIUM PHENOLPHTHALEINATE 3,3-bis(4-hydroxyphenyl)-1(3h)-isobenzofuranondisodiumsalt phenolphthalein sodium PHENOLPHTHALEIN NA SALT 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxyphenyl)-, sodium salt (1:2)