1-Hydroxyethylidene-1, 1-Diphosphonic acid（HEDP）
CAS No. 2809-21-4
Abbreviation: HEDP
Molecular weight: 206
Structural Formula

SPECIFICATIONS:
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 (1ï¼… solution) 2 max 2 max
Density (20℃)g/cm3 1.430 - 1.460 -
Fe ion ppm 10 max 20 max
APPLICATIONS:
It is mainly used as a Scale & Corrosion Inhibitor, chelating (Sequestrating), deflocculating agent in Cooling and Boiler water treatment, Textile Dying, Detergents etc.