68052-00-6 EINECS 268-296-6 Nickelate(4-), ((((nitrilo-kappaN)tris(methylene))tris(phosphonato-kappaO))(6-))-, tetrasodium, (T-4)- Tetrasodium (((nitrilotris(methylene))tris(phosphonato))(6-)-N,O,O'',O'''nickelate(4-)) Tetrasodium nickelous nitrilotri(methylenephosphonate)