Disodium of 1-hydroxy ethylidene-1, 1-diphosphonic acid
(hedp.Na2)
Cas no.: 7414-83-7
Molecular formula: c2h6o7p2na2 molecular weight: 250
Properties:
Hedp, na2 is an organophosphonic acid corrosion inhibitor, it can chelate with fe, cu, and zn ions, it can dissolve the oxidized materials, has good scale and corrosion inhibition effects even under 250, .
Specification:
Items, specifications, results
Appearance, white powder, white powder
Active content (hedp, na2)%, 90 min, 92.49
Active contenthedp%, 74.0-79.0, 76.21
Density (20, )g/cm3, --, --
Fe ions(fe3+) ppm, 35 max, 6.39
Phosphorous acid (as po33-)%, 2 max, 1.06
Moisture, %, 3.0-6.0, 4.06
Ph (1% water solution), 4.0-6.0, 5.88
Usage:
Hedp.Na2 is widely used in circulating cool water system, medium and low pressure boiler, oil field water pipelines as scale and corrosion inhibitor in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven industry, hedp.Na2 is used as detergent for metal and nonmetal. In dyeing industry, hedp.Na2 is used as peroxide stabilizer and dye-fixing agent; in non-cyanide electroplating, hedp.Na2 is used as chelating agent.
Package:
25kg/bag, and can make special specification according to customers, requirement
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 temperatures of 250C HEDP has good chemical stability under high pH values is hard to hydrolyze and is hard to decompose under ordinary light and heat conditions Its acidalkali and chlo rine oxidation tolerance are better than that of other organophosphoric acids salt HEDP can react with metal ions in the water system to form a hexaelement chelating complex with calcium ions in particular Therefore HEDP has good antiscale and visible threshold effects When built together with other water treatment chemicals it shows good synergistic effects Application HEDP is used as scale and corrosion inhibition in circulating cool water system oil field and lowpressure 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 dyefixing agent In noncyanide electroplating HEDP is used as chelating agent The dosage of 110mgL is preferred as scale inhibitor 1050mgL as corrosion inhibitor and 10002000mgL as detergent Usually HEDP is used together with polycarboxylic acid
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-)% 1.0 max 0. 1 max pH (1£¥ solution) 2 max 2 max Density (20¡æ)g/cm3 1.430 - 1.460 - Fe ion ppm 10 max 20 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. Storage for ten months in room shady and dry place.
Product Name: powder HEDP 90% Other Names: 1-Hydroxyethylidene-1,1-diphosphonic acid 1.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.. 2.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; 3.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. 4.Usually, HEDP is used together with polycarboxylic acid.
HEDP 1-Hydroxyethylidene-1,1-diphosphonic acid (Cas No.:2809-21-4 ) Cas No.: 2809-21-4 Molecular formula : C2H8O7P2 Molecular weight: 206.03 Package: HEDP liquid: 200L plastic drum,IBC(1000L),customers requirement. HEDP solid: 25kg/bag,customers requirement. Application: 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. HEDPshows 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. 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
