1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(Hedp)

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.

1-hydroxy ethylidene-1 1-hydroxy ethylidene-1, 1-diphosphonic acid (hedp, zf111) [cas no.] 2809-21-4, dequest: 2010 Molecular formula: c2h8o7p2, molecular weight: 206 Structural formula: Properties: This product is an organophosphoric acid corrosion inhibitor, it can chelate with fe, cu, and zn ions to form stable chelating compounds, thus it can dissolve the oxidized materials on these metalsf+ surfaces. Hedp shows excellent antiscale corrosion inhibition effects under temperature 250f¬. It has good stability under high ph value, is hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its properties of acid/alkali and chlorine oxidation resistance are better than that of other organophosphoric acids (salt). Hedp can react with metal ions in water system to form hexa-element chelating complex, especially with calcium ion to form capsule polymer chelating complex. Therefore, this product has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effective performance. Specification: Items Index Appearance Colorless or light yellow transparent liquid 0kg in plastic barrel, or 250kg in plastic barrel for export, or confirmed by clients. Storage for ten months in room shady and dry place.

CAS :2809-21-4 Molecular Formula:C2H8O7P2 Molecular weight: 206.02 1, Properties HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn etc. metal ions and form stable complex compound. It can dissolve the oxidized materials on these metals'surfaces. Under250OC HEDP shows excellent scale and corrosion inhibition ability. 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 of HEDP is high purity product, suitable for using in winter and freezing districts. it is quite suitable for using as cleaning agent in electronic fields and as additives in daily chemicals. 2, Specification: ITEMS Index Appearance Colorless or light yellow transparent liquid White crystal powder Active content (as HEDP) % ¡Ý 50.060.0 89.0 Phosphorous acid (as PO33-)%¡Ü 2.02.0 0.80 Phosphoric acid(asPO43- )% ¡Ü 0.80.8 0.50 Chloride (as Cl-)% ¡Ü 1.01.0 0.10 pH (1% solution) ¡Ü 22 2.0 Density(20OC)g/cm3 ¡Ý 1.341.40 ¡ª¡ª Fe ion ppm ¡Ü 10 10 5.0. 3,HEDP Application range&using method HEDP is widely used in the in circulating cool water system of electric power, chemical industry, metallurgy, fertilizer, etc. and widely used as a scale and corrosion inhibitor of low-pressure boilers, field waterflood, oil pipeline. In light&textile 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. 4,Safety Protection:HEDP is Acidity, Avoid contact with eye and skin, once contacted, flush with water. Package and Storage:ATMP liquid: Normally In 30kg or 250kg net Plastic Drum;ATMP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients request.Storage for ten months in room shady and dry place.

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 - 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.