yttrium (90y) tacatuzumab tetraxetan yttrium (90y) tacatuzumab tetraxetan yttrium (90y) tacatuzumab tetraxetan (trade name afp-cide) is a humanized monoclonal antibody intended for the treatment of cancer. the antibody itself, tacatuzumab, is conjugated with tetraxetan, a chelator for yttrium-90, a radioisotope which destroys the tumour cells. yttrium (90y) tacatuzumab tetraxetanmonoclonal antibodytypewhole antibodysourcehumanized (from mouse)targetα-fetoproteinclinical dataatc codenoneidentifierscas number476413-07-7 nchemspidernoneuniigj2416wk6ychemical and physical dataformulac6470h9971n1712o2007s4290ymolar mass145 kg/mol ny (what is this?) (verify)