1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP)
Synonyms:
HEDP; HEDPA;
1-Hydroxyethylidene diphosphonic Acid; Etidronic acid;
1-Hydroxyethane-1,1-diphosphonic acid
CAS No.: 2809-21-4
Molecular Weight: 206.03
Molecular Formula: C2H8O7P2
Structure:

Application:
1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is used as scale inhibitor,
deflocculant, sequestrant and water stabilizer in cooling
water systems.
Specification:
Appearance: |
Clear, colorless to yellowish liquid |
Active substances (%): |
58.0 - 62.0 |
Phosphorous acid (as PO33-,
%): |
3.0 max. |
Iron content (ppm): |
35 max. |
Calcium chelation value (as CaCO3,
mg/g): |
400 min. |
pH (1% solution): |
2 max. |
Density (20°C, g/cm3): |
1.45 min. |
Standard Packing:
250kg net/200L PE drum
Safety Information:
1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is corrosive, so avoid contact with eyes and skin. The hazard code is UN 3265.
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