1-Hydroxyethane-1,1-diphosphonic Acid CAS NO.2809-21-4

ITEMS Index HG/T 3537-1999 　 Appearance Colorless or light yellow White crystal transparent liquid powder Active content (as HEDP) % ≥ …

ITEMS Index HG/T 3537-1999 　 Appearance Colorless or light yellow White crystal transparent liquid powder Active content (as HEDP) % ≥ 50.0 60.0 89.0 Phosphorous acid (as PO33-)%≤ 2.0 2.0 0.80 Phosphoric acid (asPO43- )% ≤ 0.8 0.8 0.50 Chloride (as Cl-)% ≤ 1.0 1.0 0.10 pH (1％ solution) ≤ 2 2 2.0 Density (20℃) g/cm3 ≥ 1.34 1.40 —— Fe ion ppm ≤ 10 10 5.0 Active content (as HEDP H2O) % ≥—— 98.0 Ca sequestration mg/g ≥ 450 500 --