双甘膦(PMIDA) 商品名称: 双甘膦 化学名称: N－(膦酰基甲基)亚氨基二乙酸 英文名称: N－(Phosphonomethyl)iminodiacetic acid (PMIDA) 分子式 : C5H10NO7P 结构式： 分子量：227 理化性质:纯品、工业品均为白色结晶, 熔点210℃(分解), 微溶于水, 不溶于乙醇、丙酮、乙醚、苯等有机溶剂。能与碱类、胺类成盐。 Phosphonates or phosphonic acids are organic compounds containing C-PO(OH)2 or C-PO(OR)2 groups (where R=alkyl, aryl). Bisphosphonates were first synthesized in 1897 by Von Baeyer and Hofmann. An example of such a bisphosphonate is HEDP (Etidronic acid or Didronel). Since the work of Schwarzenbach in 1949, phosphonic acids are known as effective chelating agents. The introduction of an amine group into the molecule to obtain -NH2-C-PO(OH)2 increases the metal binding abilities of the phosphonate. Examples for such compounds are NTMP, EDTMP and DTPMP. These common phosphonates are the structure analogues to the well-known aminopolycarboxylates NTA, EDTA, and DTPA. The stability of the metal complexes increases with increasing number of phosphonic acid groups. Phosphonates are highly water-soluble while the phosphonic acids are only sparingly soluble. Phosphonates are not volatile and are poorly soluble in organic solvents.
