Hydroxy ethylidene diphosphonic acid, HEDP phosphonate:
Specifications of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid Specifications 1-Hydroxyethylidene-1,1-Diphosphonic Acid
Appearance | Clear colorless to pale yellow aqueous solution |
Active content | 58-62% |
Phosphorous Acid as PO3 | 2.0% max |
Phosphoric Acid as PO4 | 0.8% |
pH of 1% solution | 2% max |
Specific gravity | 1.43-1.46 (Water is 1) |
Iron as Fe | 10 ppm max |
Chloride as Cl | 100 ppm max |
Color (APHA) | 30 max |
Ca sequestrantion mg CaCO3/g | 480 min |
Acetic Acid | 1% max |
HEDP can also be offered in lower chloride content | |
Sodium or Calcium salt of HEDP is also offered | |
The material is also offered with lower phosphorous acid and phosphoric acid | |
The material is also offered as 90% white crystals or powder |
Applications:
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid or 1-Hydroxyethylidene-1,1-Diphosphonic Acid or Hydroxy Ethylidene Diphosphonic Acid or HEDP is mainly used as a scale and corrosion inhibitor, chelating (sequestrating), deflocculating agent in cooling and boiler water treatment, textile dying detergent etc.