1-Hydroxy Ethylidene-1

HEDP is an organ phosphoric 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¡æ. 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 organ phosphoric 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. Appearance: colorless or light yellow transparent liquid Active content HEDP : 58.0-62.0 Phosphorous acid as po33-%: 2.0 max Phosphoric acid aspo43- %: 0.8 max Chloride (as cl-)%: 0.01 max Ph 1 solution: 2 max Density 20¡æg/cm3: 1.40 Fe ion ppm : 10 max Colour alpha (hazen): 40 max.

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 metalsí» surfaces. HEDP shows excellent scale and corrosion inhibition effects under temperature 250 Celsius degree. 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. 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. HEDP liquid: Normally In 250kg net Plastic Drum, IBC drum can also be used as required HEDP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients.

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) CAS No. 2809-21-4 Dequest:2010 Molecular Formula: C2H8O7P2 Molecular weight: 206.02 Structural Formula: 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 metalsí» surfaces. HEDP shows excellent scale and corrosion inhibition effects under temperature 250íµ. 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 index Appearance Colorless or light yellow transparent liquid White crystal powder Active content (HEDP)% 58.0-62.0 89.0 min Phosphorous acid (as PO33-)% 2.0 max 0.5 max Phosphoric acid (asPO43- )% 0.8 max 0.5 max Chloride (as Cl-)% 0.01 max 0.01 max pH (1úÑ solution) 2 max 2 max Density (20íµ)g/cm3 1.40 - Fe ion ppm 10 max 20 max Colour APHA (Hazen) 40 max - Usage: 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 and Storage: HEDP liquid: Normally In 250kg net Plastic Drum, IBC drum can also be used as required HEDP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients. Storage for ten months in room shady and dry place. Safety Protection: Acidity, Avoid contact with eye and skin, once contacted, flush with water.íí

1-hydroxy ethylidene-1 Specification: Items index Appearance colorless or light yellow transparent liquid white crystal powder Active content¨hedp58.0-62.0 89.0 min Phosphorous acid¨as po33-% 2.0 max 0.5 max Phosphoric acid ¨aspo43- % 0.8 max 0.5 max Chloride (as cl-)% 0.01 max 0.01 max Ph¨1solution 2 max 2 max Density ¨20g/cm3 1.40 Fe ion ppm 10 max 20 max Colour apha (hazen) 40 max Hedp liquid: normally in 250kg net plastic drum, ibc drum can also be used as required hedp solid: 25kg inner liner polyethylene (pe) bag, outer plastic woven bag, or confirmed by clients.

Usage of HEDP: 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 and storage of HEDP: Hedp liquid: normally in 250kg net plastic drum, ibc drum can also be used as required hedp solid: 25kg inner liner polyethylene (pe) bag, outer plastic woven bag, or confirmed by clients. Storage for ten months in room shady and dry place.

Ii. Items, index Appearance, clear, colorless to ale yellow aqueous solution Active content (hedp)%, 58.0-62.0 Phosphorous acid (as po33-)%, 2.0 max Phosphoric acid (aspo43- )%, 0.8 max Chloride (as cl-) ppm, 100.0 max Ph (1% solution), 2.0 max Density (20¡æ)g/cm3, 1.43-1.47 Fe, mg/l, 10.0 max Colour apha (hazen), 30.0 max Acetic acid %, 0.5 max Ca sequestration (mg caco3/g), 500.0 min

Ii. Quality index Items, index Appearance, white powder solid Active content %, 90.0 Active content(hedp.H2o) %, 98.0 Phosphoric acid content(as po43-) %, 0.50 Phosphorous content(as po33- ) %, 0.50 Chloride (as cl-)%, 0.10 Fe (as fe) (ppm), 5.0 Ph (1% aqueous solution), 2.0

1-hydroxy ethylidene-1, 1-diphosphonic acid (hedp) Cas no. 2809-21-4 Molecular formula: c2h8o7p2 molecular weight: 206.02 Propertiesof hedp: Hedp is an organophosphoric acid corrosion inhibitor. Hedp can chelate with fe, cu, and zn ions to form stable chelating compounds. Hedp can dissolve the oxidized materials on these metals' surfaces. Hedp shows excellent scale and corrosion inhibition effects under temperature 250 c. 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, hedp 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, hedp can be used as cleaning agent in electronic fields and as additives in daily chemicals. Hedp liquid: normally in 250kg net plastic drum, ibc drum can also be used as required hedp solid: 25kg inner liner polyethylene (pe) bag, outer plastic woven bag, or confirmed by clients. Storage for ten months in room shady and dry place.

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