((2-Hydroxy-1,3-propanediyl)bis(nitrilobis(methylene)))tetrakisphosphonic acid 2-Hydroxy-1,3-propylenediamine-N,N,N'(sup 1),N'(sup 1)-tetramethylenephosphoric acid 2-Hydroxy-1,3-propylenediamine-N,N,N',N'-tetra(methylenephosphonic acid) 2-Oxy-1,3-propylenediamine-N,N,N',N'-tetramethylenephosphonic acid 54622-43-4 DPF-1 Phosphonic acid, ((2-hydroxy-1,3-propanediyl)bis(nitrilobis(methylene)))tetrakis- Phosphonic acid, ((2-hydroxy-1,3-propanediyl)bis(nitrilobis(methylene)))tetrakis-, (11beta,16alpha)- Phosphonic acid, ((2-hydroxytrimethylene)bis(nitrilodimethylene))tetra-