4-Benzofurazansulfonic acid, 7-fluoro-, ammonium salt 4-Fluoro-7-sulfobenzofurazan 7-Fluoro-2,1,3-benzoxadiazole-4-sulfonate 7-fluorobenzo-2-oxa-1,3-diazole-4-sulfonate 84806-27-9 AFSBF Ammonium 4-fluoro-7-sulfobenzofurazan Ammonium-7-fluorobenzo-2-oxa-1,3-diazole-4-sulfonate SBD-F