Mono-sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid

(HEDP·Na)

[CAS No.] 29329-71-3

Molecular Formula:  C₂H₇O₇P₂Na                          Molecular weight: 228

Structural Formula:

Properties:

    This product is an organophosphoric acid corrosion inhibitor, can chelate with Fe, Cu, and Zn ions to form stable chelating compounds, can dissolve the oxidized materials on these metals’ surfaces, shows excellent antiscale corrosion inhibition effects under temperature 250℃, is stable under high pH value, is not easy to hydrolyze, is not easy to decompose under normal light and heat condition, its acid/alkaline resistance and chloride oxidation resistance are better than that of other organophosphoric acids. It can form six-ring chelating compounds with metal ions in water system, especially Ca2+. Therefore, this product has good scale inhibition effects and obvious dissolution threshold effects. When used together with other water treatment agents, the synergistic effects is better.

Specification:

Usage:

    This product is widely used in circulating cool water system, medium and low pressure boiler, oil field water pipelines as antiscale corrosion inhibition in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light weaven industry, this product is used as detergent for metal and nonmetal. In dyeing industry, this product is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, this product is used as chelating agent.

    When used as scale inhibitor, the dosage 2-20mg/L is preferred, when used as corrosion inhibitor, the dosage 20-100mg/L is preferred, when used as cleaning agent, the dosage 1000-2000mg/L is preferred. Usually, this product is used together with polycarboxylic acid.