Pharmaceutical IntermediateChina 1, 4-Bis (Bromomethyl) Benzene; Alpha, Alpha′-Dibromo-P-Xylene CAS 623-24-5, Find details about China 1 4-Bis (Bromomethyl) Benzene, CAS 623-24-5 from 1, 4-Bis (Bromomethyl) Benzene; Alpha, Alpha′-Dibromo-P-Xylene CAS 623-24-5