Liquid HEDP 60% CAS 2809-21-4 is a kind of scale and corrosion inhibitor which belongs to organic phosphonic acid. It can form stable complexes with iron, copper, zinc and other metal ions, and can also dissolve the metal surface oxide. Under 250 ºC condition, HEDP can still play a good corrosion and scale inhibition effect.

HEDP has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its acid/alkali and chlorine oxidation tolerance show better than that of other organic phosphonic acid (salt) acids (salt).
HEDP can react with metal ions in water system to form hexa-element chelating complex, especially with calcium ions. Therefore, HEDP has good anti-scale and visible threshold effects. When used in combination with other water treatment chemicals, it shows ideal synergistic effects.
HEDP solid state is a high purity product, suitable for cold winter areas; Because of its high purity, it is especially used as the cleaning agents in electronics industry, and additives in daily chemicals.

Names and Identifiers
Name 1-Hydroxyethylidene-1,1-diphosphonic acid
Synonyms 1-Hydroxyethane-1,1-diphosphonic Acid
Etidronic acid
HEDP
HEDPA
Hydroxyethylidene-1,1-Diphosphonic Acid
Hydroxy Ethylidene-1,1-Diphosphonic Acid
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
1-Hydroxyethylidene diphosphonic Acid
1-hydroxy ethylene-1,1-diphosphonic acid
1-HYDROXYETHYLIDENEDI (PHOSPHONIC ACID)
disodium (1-hydroxyethane-1,1-diyl)bis[hydrogen (phosphonate)]
(1-hydroxyethane-1,1-diyl)bis(phosphonate)
Hydroxyethylidenedi(phosphonic acid)
1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP)
CAS 2809-21-4
EINECS 220-552-8
InChI InChI=1/C2H8O7P2/c1-2(3,10(4,5)6)11(7,8)9/h3H,1H3,(H2,4,5,6)(H2,7,8,9)/p-4

Physico-chemical Properties
Molecular Formula C2H8O7P2
Molar Mass 201.999 g/mol
Melting Point 198~199℃
Boling Point 578.8°C at 760 mmHg
Flash Point 303.8°C
Vapor Presure 8.34E-16mmHg at 25°C

Risk and Safety
UN IDs UN 3265

Products :

Liquid HEDP 60% CAS 2809-21-4 | Stock supply
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