1-Hydroxyethylidene-1,1-diphosphonic acid HEDP CAS 629-82-3 Picture show:
Item | Index | ||
Solid | 60% Liquid | 50% Liquid | |
HG/T 3537-2010 | GB/T 26324-2010 | ||
Appearance | white crystal powder | clear or colorless to pale yellow aqueous solution | clear or colorless to pale yellow aqueous solution |
Active content(HEDP)% | ≥89 | ≥60 | ≥50 |
Phosphorous acid (as PO3³-)% | ≤0.8 | ≤1 | ≤1 |
Phosphoric acid (as PO4³- )% | ≤0.5 | ≤0.6 | ≤0.6 |
Chloride (as Cl-)% | ≤0.01 | ≤0.01 | ≤0.01 |
pH (1% water solution) | 1.5-2.0 | 1.5-2.0 | 1.5-2.0 |
Density (20ºC)g/cm3 | -- | ≥1.40 | ≥1.36 |
Fe, mg/L | ≤20.0 | ≤20.0 | ≤10.0 |
Active component (HEDP·H2O) /% | -- | -- | ≥97.0 |
Ca sequestration (mg CaCO3/g) | -- | ≥500 | ≥450 |
This product is acidic, pay attention to labor protection during operation, should avoid contact with skin, eyes and so on, should immediately wash with plenty of water after contact. |