: B 2541 (OTTO) 2-Bromo-9-fluorenone, 97% Cas 3096-56-8 - used as organic intermediates functional materials. B 2541 (OTTO) 2-Bromo-9-fluorenone, 97% Cas 3096-56-8 - used as best liquid crystal material. B 2541 (OTTO) 2-Bromo-9-fluorenone, 97% Cas 3096-56-8 - used as an OLED intermediate.