B 1055 (OTTO) 3-Bromopropionyl chloride, 96% Cas 7148-74-5 - used to synthesize cellulose macroinitiator for homogeneous atom transfer radical polymerization. B 1055 (OTTO) 3-Bromopropionyl chloride, 96% Cas 7148-74-5 - used in the synthesis of 2-aminopropionyl polystyrene resin by Friedel Crafts reaction[2].