HEDP,2809-21-4,HEDPA  

 

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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:

HEDP,2809-21-4,HEDPA

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 (20C, 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.