Structural features: the molecule contains a hydroxyethylidene (-CH2-C (OH)-), two phosphonic acid group (-PO3H2), two hydrogen atoms replaced by sodium ions to form two phosphonate negative ion (-PO3Na), with two oxygen atoms can be coordinated with metal ions to form stable complexes . Two of the hydrogen atoms are replaced by sodium ions to form two phosphonate negative ions (-PO3Na), with two oxygen atoms that can be coordinated with metal ions, and can form stable complexes with metal ions HEDP tetrasodium salt (HEDP・Na4)
Molecular Formula: C2H4O7P2Na4 Structural features: HEDP tetrasodium salt is the HEDP four hydrogen atoms have been replaced by the sodium ion product, the molecular carbon of hydroxyethylene in the molecule is replaced by sodium ions. The carbon atoms of hydroxyethylidene in the molecule are connected with two phosphonate ions (-PO3Na2) to form a stable structure. This structure makes HEDP tetrasodium has a strong chelating ability, can form stable complexes with a variety of metal ions, especially for calcium ions, magnesium ions, etc. has a good chelating effect, so as to play the role of scale inhibition, corrosion inhibition
