HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn ions to form stable chelating compounds. It can dissolve the oxidized materials on these metals' surfaces. HEDP shows excellent scale and corrosion inhibition effects under temperature 250ºC. 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 chlo rine oxidation tolerance are better than that of other organophosphoric acids (salt). HEDP can react with metal ions in water system to form hexa-element chelating complex, with calcium ion in particular. Therefore, HEDP has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects.
Product Name:1-Hydroxyethylidene-1,1-diphosphonic acid
IdentificationMolecular Formula:C2H8O7P2Molecular Weight
:206.02EINECS
Number:220-552-8CAS Number:2809-21-4PropertiesMelting point :198~199ºCBoiling point:578.8±60.0 °C(Predicted)Density:1.45 (60% aq.)
Product Specification
Product Application
HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP is used as chelating agent. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid.
HEDP is a scale and synergistic corrosion inhibitor for iron rust and mineral scalefrom pipes of cooling circulation water units and boilers; Metal chelateagent for color fixing and bleaching in textile; Complexing agent for electronplate and scale cleaning agent for metals.

Package:25kg/bag,50kg/bag,1000kg/bagShipping marks can be customized according to customer requirements
Shipping marks can be customized according to customer requirements

Dalian Huayang Machinery and Chemistry Co., Ltd.
has been engaged in the chemical industry for more than 12 years. We are leading chemical enterprise engaged in the research, development, production and sale of chemicals. With a rich product portfolio and strong technical strength, our company has established business relations with more than 130 countries across Asia, Europe and Africa. Huayang Chemistry Trade Company is a leading chemical enterprise engaged in the research, development, production and sale of chemicals. With a rich product portfolio and strong technical strength, our company has established business relations with more than 130 countries across Asia, Europe and Africa.

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