5-Bromovaleryl chloride , with CAS number of 4509-90-4, can be called Valerylchloride, 5-bromo- (7CI,8CI) ; 5-Bromovaleric acid chloride ; 5-Bromovaleroylchloride ; 5-Bromovaleryl chloride, 98% ; pentanoyl chloride, 5-bromo- .