CATECHOL VIOLET, PyrocatecholVioletGr, Pyrocatechol violet, Pyrocatecholsulfonphthalein, 3,3-bis-(3,4-dihydroxy-phenyl)-3H-benz[c][1,2]oxathiol-1,1-dioxide, Brenzcatechinviolett, PYROCATECHOLSULFONEPHTHALEIN, 3,3-Bis-(3,4-dihydroxy-phenyl)-3H-benz[c][1,2]oxathiol-1,1-dioxid, Pyrocatechimsulfonphthalein violed, PyrocatechinSulfonphthaleinViolet, PYROCATECHOL SULPHONPHTHALEIN, Catecholsulfonphthalein, CATECHOLSULFONAPHTHALEIN