Detailed Product Description

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)

?CAS? 2809-21-4 Dequest:2010

Molecular Formula: C2H8O7P2 Molecular weight: 206

Structural Formula:



Properties:
This product is an organophosphoric acid corrosion inhibitor, It can chelate with Fe, Cu, and Zn ions to form stable chelating compounds, thus it can dissolve the oxidized materials on these metals’ surfaces. HEDP shows excellent antiscale corrosion inhibition effects under temperature 250?. It has good stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions.

Specification:
items index
Appearance Colorless or light yellow transparent liquid White crystal powder
Active content(HEDP)% 58.0-62.0 89.0 min
Phosphorous acid(as PO33-)% 2.0 max 0.5 max
Phosphoric acid (asPO43- )% 0.8 max 0.5 max
Chloride (as Cl-)% 0.01 max 0.01 max
pH(1% solution) 2 max 2 max
Density (20?)g/cm3 1