A mixture of: tetrasodium-phosphonoethane-1,2-dicarboxylate, hexasodium-phosphonobutane-1,2,3,4-tetracarboxylate Download RIS-WEBcode-Novecare-ITC288S_Bricorr 288-V01_VPI_12 12 13 (pdf) CAS Number 143239-08-1 EC Number 410-800-5