3f8 3f8 3f8 is a murine igg3 monoclonal antibody which binds to gd2. 3f8monoclonal antibodytype?sourcemousetargetgd2clinical dataroutes ofadministrationintravenousatc codenoneidentifierscas number339169-93-6 ychemspidernoneunii3gfs72wn4m ny (what is this?) (verify) it has been used in the detection and treatment of neuroblastoma. for imaging neuroblastoma, it is labelled with one of the radioisotopes iodine-124 and iodine-131.