... by big customers, suh as BASF, DSM, Dupont,etc COMMODITY: 2,2-AZOBISISOBUTYRONITRILE (AIBN) (DUPONT REF: VAZO 64)CAS NO.: 78-67-1MOLECULAR FORMULA ... 003%MELTING POINT 97-103VISIBLE CONTAMINATION ≤ 10 SPECKS/10g USAGE:2,2'-AZOBIS(2-METHYLBUTYRONITRILE) FOR FREE RADICAL REACTIONS. BLOWING AGENT FOR ELASTOMERS ... PACKAGEREMARKS: IMO CLASS 4.1-INFLAMMABLE SOLID UN NO. 3234 2,2'-AZOBISISOBUTYRONITRILE (AIBN)