CAS 2809-21-4 1-Hydroxyethylidene-1,1-Diphosphonic Acid

Brief introduction

Hydroxyethylidenediphosphonic acid, also known as hydroxyethylidenediphosphonic acid, is referred to as HEDP 60% 98%, and the standard code is ZH111ZS. It not only has good scale inhibition performance, but also has corrosion inhibition. It is widely used for scale and corrosion inhibition of industrial circulating water in electric power, chemical industry, metallurgy and other industries, oilfield oil production and water injection, winter heating circulating water and other systems. It can be used alone or combined with other scale inhibitors and corrosion inhibitors. It is a water treatment agent with excellent performance.

Specification of HEDP

HEDP 58%-62% liquid

Appearance Colorless to pale yellow aqueous solution
Active content (HEDP)% 58.0-62.0
Phosphorous acid (as PO33-)% 1.0 max
Phosphoric acid (asPO43- )% 0.6 max
Chloride (as Cl-) ppm 100.0 max
pH (1% solution) 2.0 max
Density g/cm3 1.43-1.47
Fe,mg/L 10.0 max
Colour APHA (Hazen) 30.0 max
Ca sequestration (mg CaCO3/g) 500.0 min

HEDP 98% solid

Appearance White crystal powder
Active content(HEDP)% 90.0 min
Active content (HEDP H2O)% 98.0 min
Phosphorous acid (as PO33-)% 0.8 max
Phosphoric acid (asPO43- )% 0.5 max
Chloride (as Cl-) ppm 100.0max
pH (1% solution) 2.0 max
Fe,mg/L 5.0 max