1H-Pyrazole, 3,4-dibromo- (9CI) 3,4-Dibromopyrazole 4-23-00-00560 (Beilstein Handbook Reference) 5932-18-3 BRN 0002163 NSC 222393 PYRAZOLE, 3,4-DIBROMO- Pyrazole, 3,4(or 4,5)-dibromo- (7CI)