imgatuzumab imgatuzumab imgatuzumab (inn) is a humanized monoclonal antibody designed for the treatment of cancer. it is an anti-egfr antibody that acts as an immunomodulator. imgatuzumabmonoclonal antibodytypewhole antibodysourcehumanized (from rat)targetegfrclinical dataatc codenoneidentifierscas number959963-46-3chemspidernoneuniiv77j4wjf9zkeggd10439chemical and physical dataformulac6434h9942n1718o2016s44molar mass145028.96 g·mol−1 the drug was developed by genentech/roche.