Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic
Acid (HEDP•Na4)

CAS No.  29329-71-3 (x-Na), 3794-83-0 (4-Na)   Synonyms: Tetrasodium etidronate

Molecular Formula: C₂H₄O₇P₂Na₄                     Molecular weight: 294

Structural Formula:

Properties:

Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is the sodium salt of HEDP,Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is an good scale inhibitor for calcium carbonate, it can be used in low pressure boiler water system, circulating water system, industrial and municipal cleaning water system and swimming pool.

The solid Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is white powder, soluble in water, easily deliquescence, suitable for use in winter and freezing districts. Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is a kind of organophorphonic acid scale and corrosion inhibitor, can form stable complex with Fe, Cu and Zn ions, it can dissolve the oxides on metal surface, it has good scale and corrosion inhibition effect under 250℃.

Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is widely used in circulating cool water system, medium and low pressure boiler, oil field water pipelines as scale and corrosion inhibitor in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light