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Chemical name: | 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid | ||
CAS No.: | 2809-21-4 | ||
Molecular formula/weight: | C2H8O7P2=206.02 | ||
PROPERTIES: 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 250℃. 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 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. The solid state of HEDP is crystal powder, suitable for usage in winter and freezing districts. Because of its high purity, it can be used as cleaning agent in electronic fields and as additives in daily chemicals. | |||
SPECIFICATION: | |||
Items | Liquid | Solid | |
Appearance | Colorless or pale yellow solution | White crystalline powder | |
Active content | 60.0% min | 90.0 min. | |
Phosphorous acid (as PO33-) | 2.0% max. | 0.8 max | |
Phosphoric acid (as PO43- ) | 0.8% max. | 0.5 max | |
Chloride (as Cl-) ppm | 100 max | 100 max | |
PH value of 1% solution | 2.0 max. | 2.0 max | |
Density (20℃)g/cm3 | 1.44 min | ||
Fe mg/L | 10 max. | 5 max | |
Color(Hazen) | 50 max | ||
Ca sequestration (mg CaCO3/g) | 500 min | ||
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. | |||
PACKAGE: Liquid:250 kg net PE drums or 1250kg net IBC. Solid: 25 kg net bags. | |||
We keep on to establish and style and design outstanding top quality goods for Water Treatment Chemicals, HEDP, 1-Hydroxy Ethylidene-1, 1-Diphosphonic Acid. We gradually build into a corporate culture with unity, hard work, pragmatism, enterprise, innovation and responsibility as the core. With the tenet of 'product quality and user needs are the eternal pursuit of the enterprise', we have won the trust of customers and our sales network spreads all over the world.
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