CAS: 19847-10-0 EC No: 243-367-4 MDL No: MFCD00792886 UN No: UN3261; Haz Class: 8; Packing Group: II Powder Molecular Formula: C₅H₃ClN₂O MW: 142.55

CAS: 39416-48-3 EC No: 254-446-8 MDL No: MFCD00013223 UN No: UN3261; Haz Class: 8; Packing Group: III Crystalline Molecular Formula: C₅H₅N·HBr·Br₂ MW: 319.82 Melting Point: 128-136°