HEDP (HYDROXYETHYLENE DIPHOSPHONIC ACID)

HEDP (HYDROXYETHYLENE DIPHOSPHONIC ACID)

HEDP CAS number: 2809-21-4

HEDP EINECS number: 220-552-8

HEDP IUPAC name: (1-hydroxy-1-phosphonoethyl) phosphonic acid

Synonyms;

Etidronic acid; Hydroxyethylidene Diphosphonic acid; HEDP; 1-Hydroxyethane-1,1-diphosphonic acid; 1-Hydroxyethylidene-1,1-diphosphonic acid; 1-hydroxyethylidenedi(phosphonic acid); Etidronic Acid; 1-Hydroxyethylidene-1,1-bis-(phosphonic acid); Ethane-1-hydroxy-1,1-diphosphonic acid; HEDP; 1-Hydroxy-1,1-diphosphonoethane; Oxyethylidenediphosphonic acid; detmp; heedtmp; disuccinic; dtpmp; edds; taed; stpp; hedta; diphosphoric; dequest; heptasodium; HEDP; Etidronic acid; etidronate; 1-Hydroxyethylidene-1,1-diphosphonic acid; EHDP; Etidronsaeure; Acetodiphosphonic acid; Hydroxyethanediphosphonic acid; Turpinal SL; Oxyethylidenediphosphonic acid; Didronel; Dequest 2015; Dequest Z 010; Acido etidronico; Ferrofos 510; Acide etidronique; 1-Hydroxyethane-1,1-diphosphonate; 1-Hydroxyethane-1,1-diphosphonic acid; Phosphonic acid, (1-hydroxyethylidene)bis-; Diphosphonate (base); (1-Hydroxyethane-1,1-diyl)diphosphonic acid; 1-Hydroxyethanediphosphonic acid; Dequest 2010; Ethane-1-hydroxy-1,1-diphosphonic acid; (Hydroxyethylidene)diphosphonic acid; Ethane-1-hydroxy-1,1-diphosphonate; (1-Hydroxyethylene)diphosphonic acid; Acide etidronique [INN-French]; Acidum etidronicum [INN-Latin]; (1-Hydroxyethylidene)diphosphonic acid; 1,1,1-Ethanetriol diphosphonate; 1-Hydroxyethylidene-1,1-bisphosphonate; 1-Hydroxyethane-1,1-bisphosphonic acid; 1-HYDROXY-1,1-DIPHOSPHONOETHANE; (1-Hydroxyethylidene)bis(phosphonic acid); Acidum etidronicum; (1-Hydroxyethylidene)bisphosphonic acid; (1-hydroxyethane-1,1-diyl)bis(phosphonic acid); Hydroxyethane-1,1-diphosphonic acid; 1000SL; (1-Hydroxyethylidene)diphoshonic acid; (1-hydroxy-1-phosphonoethyl)phosphonic acid; 1-Hydroxyethylidene-1,1-biphosphonate; Phosphonic acid, (1-hydroxyethylidene)di-; EINECS 220-552-8; Ethane-1-hydroxy-1,1-bisphosphonate; MFCD00070585; Phosphonic acid, 1-hydroxy-1,1-ethanediyl ester; CHEMBL871; NSC 227995; BRN 1789291; M2F465ROXU; HEDP; ethane-1-hydroxy-1,1-bisphosphonic acid; CHEBI:4907; (1-hydroxy-1-phosphono-ethyl)phosphonic acid; 1-hydroxyethane 1,1-diphosphonic acid; 1-HydroxyEthylidene-1,1-DiphosphonicAcid; (1-Hydroxy-1,1-ethanediyl)bis(phosphonic acid); Phosphonic acid, P,P'-(1-hydroxyethylidene)bis-; Etidronic acid (USAN/INN); C2H8O7P2; 1-Hydroxyethylidenediphosphonic acid; 1-hydroxy ethylidene; HDEPA; OEDFK; Etidronate (Didronel); Etidronic acid 60% aqueous solution; NSC227995; s1857; HEDP; STK721995; AKOS005524039; Etidronic acid, 60% aqueous solution; (1-hydroxy-ethylidene)diphosphonic acid; NCGC00257971-01; K958; SC-25504; 1-hydroxyethane-1,1-diyldiphosphonic acid; CAS-2809-21-4; 1-hydroxy ethylidene-1,1-diphosphonic acid; LS-106637; HEDP; FT-0607934; (1-Hydroxy-1-phosphono-ethyl)-phosphonic acid; (1-Hydroxyethylidene)bisphosphonic acid monohydrate; 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (Powder); (1-Hydroxyethane-1,1-diyl)diphosphonic acid monohydrate; 1-Hydroxyethylidenediphosphonic acid 60% aqueous solution; HEDP; etidronic acide; HEDP; HEDP(A); HEDPA; Etidronik Asit; 1-hidroksi Etiliden-1,1-Difosfonik Asit; Hidroksietiliden-1,1 difosfonik Asit (HEDP); 1-Hidroksietilidenedifosfonik asit; Hidroksietiliden Difosfonik asit(HEDP); 1-Hidroksi-1,1-Etandiil ester; Oksietilidenedifosfonik asit (OEDP);

Physical and Chemical Properties of HEDP (Hydroxyethylidene Diphosphonic Acid)

HEDP (Hydroxyethylidene Diphosphonic Acid) molecular weight: 206.03 g / mol

HEDP (Hydroxyethylidene Diphosphonic Acid) molecular formula: C2H8O7P2

HEDP (Hydroxyethylidene Diphosphonic Acid) boiling point: 578.8 ° C

HEDP (Hydroxyethylidene Diphosphonic Acid) solubility: 3.35 M

HEDP (Hydroxyethylidene Diphosphonic Acid) density: 1.45 g / mL

HEDP (Hydroxyethylidene Diphosphonic acid) has a unique Chemical formula and physical properties. HEDP is soluble in water. HEDP is white or pale yellow in color. One of the most important features of HEDP is its chloride level lower than 0.1%. HEDP is usually sold in a 60% aqueous solution.

HEDP (Hydroxyethylidene Diphosphonic acid) is usually produced in glass lined reactors using phosphorous acid or phosphorus trichloride as raw materials. They produce Acetic Acid (CH3COOH) jointly in both processes.

1-10 mg / L dosage scale inhibitor, 10-50 mg / L dosage corrosion inhibitor, 1000-2000 mg / L dosage Generally used with HEDP (Hydroxyethylidene Diphosphonic acid) polycarboxylic acid as detergent.

HEDP (Hydroxyethylidene Diphosphonic acid) Liquid; 200 L Plastic drum, IBC (1000 L) may vary according to the request of the customer.

HEDP (Hydroxyethylidene Diphosphonic acid) Solid; 25 Kg / Bag, which can vary according to the request of the customer. It can be stored in a shady room and dry place for 10 months.

1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) commercially abbreviated as HEDP. And in general, this HEDP is known in industry and colloquially as HEDP. HEDP is widely used as Etidronic Acid by some people. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is an acidic and organic water treatment chemical, which is generally considered as industrial class, with the chemical structure of phosphonates. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) molecule consists of 2 classical phosphonic acid (H2PO3) groups below and above the structure, acidic phosphonate group 4 reactive hydroxyl groups (OH), phosphorus, hydrogen and oxygen bonding. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP), as an acidic phosphonate chemical, functions as a chelating or chelating chemical to prevent lime formation in industrial plant and power plant processes. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) acts as a corrosion inhibitor to prevent rust in such industrial processes. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) reduces the effect of metal ions and passivates these metal ions. It forms complex molecules with Cu (Copper, Zn (Zinc), Fe (Iron) and Ca (Calcium) ions and is also unique among polyphosphate and other phosphonate families due to its Cl (Chlorine) stability.1-Hydroxyethylidene-1 , 1-Diphosphonic Acid (HEDP) can dissolve the oxidized substances on the surface of these metals.1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) has optimum use at 250 ° C and has excellent corrosion preventive effects.1-Hydroxyethylidene -1,1-Diphosphonic Acid (HEDP) acts as a stabilizing agent. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is generally produced as an industrial solution with 60% aqueous solution. 1-Hydroxyethylidene-1,1- Dif There are 2 different methods for the production of osfonic acid (HEDP). One of them is formed by the reaction of phosphorous acid (H3PO3) and Acetic Anhydride (CH3CO) 2O and its chemical equation is as follows.

2H3PO3 + (CH3CO) 2O »C2H8O7P2 (HEDP) + CH3COOH

Acetic Acid (CH3COOH) is formed as a side product. This method is used by some manufacturers in the United States. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is usually produced as an industrial solution in the form of 60% aqueous solution. 1-Hydroxyethylidene -1,1-Diphosphonic Acid (HEDP) is produced. The reaction equation is as follows regarding the production of 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP)

CH3COOH + 2PCl3 + 5H2O »C2H8O7P2 (HEDP) + 6HCl

Here, Hydrochloric Acid (HCl) is produced as a by-product. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) has a faint odor. It is freely miscible in alcohols and organic solvents. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) has a difficult acidic property with a pH of less than 1. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP), usually physical 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) in the aqueous solution is 60% while the active content in the form of crystalline powder is present as a clear colorless liquid solution or as a pale yellow aqueous solution or as a crystalline powder of higher purity. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) active content is over 90%. So the purity level is higher. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is a water soluble chemical. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is stable. Incompatible with oxidizing agents.

1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) can cause severe skin burns and eye damage. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) may cause serious eye problems if it comes into contact with the eyes. For this, it should be washed with plenty of water and if contact lenses are used, it should be removed. Personal protective equipment, gloves, goggles, masks and body protectors should be actively used before applying with 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP).

1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is highly coupled with Fe + 2, Mg + 2, Ca + 2, Pb + 2 and Ba + 2, many of which are earth metal ions. It dissolves oxidized materials well on these metal ions. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) has a very good effect with other chemicals used in water treatment systems. And its synergy with these treatment chemicals is very strong. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is perfectly compatible with the purpose of preventing stains in swimming pools because the chlorine in it is quite stable. And 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is extensively used in this field. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is used for calcification of CaCO3 and other metal compounds over a wide range of temperatures and pH. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is used extensively in industrial water purification systems in general, as a good separating agent to prevent it from forming and precipitating.1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is used in the pharmacological sector, in the production of some formulas with its high purity product. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is mostly used as 3 basic functions in the commercial field. functions in the water treatment industry to color heavy metal ions such as iron and manganese oxides and water materials. It has the ability to inhibit scale in desalination process.1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is used as an inhibiting agent that prevents lime formation in boilers, air conditioners and cooling towers of power plants, and in heating / cooling towers of some hot process factories. .1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) can prevent the breakdown of bleaching, oxidizing agents such as Hydrogen Peroxide. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is also used in Municipal water treatment plants, personal care products, soap protection. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP), its solution of appropriate purity is approved and used as a drinking water additive. 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP), bar soaps 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP), the largest single application 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) is used extensively in the cooling water of power plants.

HEDP (Hydroxyethylidene Diphosphonic Acid)

What is HEDP (Hydroxyethylidene Diphosphonic Acid)?

They are water treatment chemicals that are very heavily used in many industrial processes such as phosphonates, dispersants, bleaching agents or scale and corrosion inhibitors. In many of these applications, HEDP (Hydroxyethylidophosphonic acid) can react with divalent cations such as calcium to form stable divalent cation phosphonate precipitates. HEDP (Hydroxyethylidene Diphosphonic acid) is an organophosphoric acid inhibitor. It can bind with Zn (Zinc), Cu (Copper) and Fe (Iron) ions to form complex compounds. It can dissolve oxidized materials on these metals. HEDP (Hydroxyethylidophosphonic acid) shows excellent scale and corrosion inhibiting effects under 250 ° C. HEDP (Hydroxyethylidene Diphosphonic acid) is difficult to hydrolyze under high pH value. And it has good Chemical stability, difficult to degrade under ordinary light and heat conditions. HEDP (Hydroxyethylidene Diphosphonic acid) has better Acid / Alkali and Chlorine oxidation tolerance than other organophosphoric acids (salts). HEDP (Hydroxyethylidene Diphosphonic acid) can form hexa-element chelating complex by reacting with metal ions in the water system, especially with calcium ion. HEDP (Hydroxyethylidophosphonic acid) has very good antiscale and visible threshold effects. It shows good synergistic effects when combined with other water treatment chemicals.

Where is HEDP (Hydroxyethylidene Diphosphonic Acid) Used?

HEDP (Hydroxyethylidene Diphosphonic acid) is suitable for places where there is winter and room cold. The risk of freezing of the liquid HEDP and making production conditions difficult is eliminated.

HEDP (Hydroxyethyliden Diphosphonic acid) is used as a cleaning agent in the electronics industry and as an additive in chemicals in daily life due to its high purity.

HEDP (Hydroxyethylidene Diphosphonic acid), Chemical industry, Electric Energy, Metallurgy, Fertilizer etc. It is used as a scale and corrosion inhibitor in circulating cold water systems, oil field and low pressure boilers in areas such as.HEDP (Hydroxyethylidene Diphosphonic acid) is used in industrial water treatment systems such as cooling, boiler water treatment to prevent the formation of scales that contaminate heat transfer surfaces.

HEDP (Hydroxyethylidene Diphosphonic acid) is used in municipal water systems to prevent the precipitation of Fe (Iron) and Mn (Manganese) Oxides.

HEDP (Hydroxyethylidene Diphosphonic acid) is used to inhibition on scales for desalination.

HEDP (Hydroxyethylidene Diphosphonic acid) is used in swimming pools to control the stain and scale.HEDP (Hydroxyethylidene Diphosphonic acid) is used for peroxide bleach stabilization in industrial and institutional detergents class cleaners and Personal care products.

HEDP (Hydroxyethylidene Diphosphonic acid) is a chemical of choice in industrial water treatment versus phosphonates such as SHMP, due to its Hydrolytic stability and ability to be a scale inhibitor.

HEDP (Hydroxyethylidene Diphosphonic acid) is the only phosphonate used in the treatment of Municipal water and Personal care products.

HEDP (Hydroxyethylidene Diphosphonic acid) is technical grade. So there is no Food grade.

HEDP (Hydroxyethylidophosphonic acid) is used as a drinking water additive in some countries.

HEDP (Hydroxyethylidene Diphosphonic acid) is used as metal and non-metal detergent in light weaving industry.

HEDP (Hydroxyethylidene Diphosphonic acid) is used as a Peroxide stabilizer and dye fixing agent in the paint industry.

HEDP (Hydroxyethylidene Diphosphonic acid) is used as a chelating agent in electroplating without cyanide.

HEDP (Hydroxyethylidene Diphosphonic acid) belongs to the class of Chemicals called phosphonates added to water to increase the solubility of certain ions and prevent the precipitation of certain mineral compounds. Some phosphonates and polyphosphates as 'Chelating Agents' are used to treat water systems by inactivating metal ions in water.

Customers choose HEDP (Hydroxyethylidophosphonic acid) because of its performance or cost performance advantages over other Phosphonates and Polyphosphates. There are price differences between HEDP (Hydroxyethylidene Diphosphonic acid) and other Phosphonates and Polyphosphates due to differences in raw material costs and manufacturing process. HEDP (Etidronic acid) or 1-hydroxyethane 1,1-diphosphonic acid (HEDP) is a bisphosphonate used in detergents, water treatment, cosmetics and pharmaceutical therapy. A HEDP (etidronate) is a salt of etidronic acid. HEDP is a chelating agent and can be added as a component of gray wastewater to bind or add to some extent the effects of substances such as calcium, iron or other metal ions that can be discharged and contaminated by contaminating groundwater sources. As a HEDP phosphonate, it has anti-corrosion properties on non-expanded steel. HEDP (Etidronic acid) also delays the acidification and oxidation of fatty acids. HEDP are water treatment chemicals that are very heavily used in many industrial processes such as dispersants, bleaching agents, or scale and corrosion inhibitors. HEDP and its salts are added to detergents and other cleaning agents to prevent the effects of hard water. HEDP is also used in peroxide bleaching to prevent degradation of peroxides by transition metals. In many of these applications, HEDP (Hydroxyethylidophosphonic acid) can react with divalent cations such as calcium to form stable divalent cation phosphonate precipitates. HEDP (Hydroxyethylidene Diphosphonic acid) is an organophosphoric acid inhibitor. HEDP can bind with Zn (Zinc), Cu (Copper) and Fe (Iron) ions to form complex compounds. HEDP can dissolve oxidized materials on these metals. HEDP (Hydroxyethylidophosphonic acid) shows excellent scale and corrosion inhibiting effects under 250 ° C. HEDP (Hydroxyethylidene Diphosphonic acid) is difficult to hydrolyze under high pH value. HEDP has good Chemical stability that is difficult to degrade under ordinary light and heat conditions. HEDP (Hydroxyethylidene Diphosphonic acid) has better Acid / Alkali and Chlorine oxidation tolerance than other organophosphoric acids (salts). HEDP (Hydroxyethylidene Diphosphonic acid) can form hexa-element chelating complex by reacting with metal ions in the water system, especially with calcium ion. Therefore, HEDP (Hydroxyethylidophosphonic acid) has good antiscale and visible threshold effects. It shows good synergistic effects when done with other water treatment chemicals. HEDP (Hydroxyethylidene Diphosphonic acid) is suitable in solid form, ie Crystal powder, in places where winter and room temperatures are experienced. The risk of liquid HEDP freezing and making production conditions difficult is eliminated. HEDP (Hydroxyethyliden Diphosphonic acid) is used as a cleaning agent in the electronics industry and as an additive in chemicals in daily life due to its high purity. HEDP (Hydroxyethylidene Diphosphonic acid), Chemical industry, Electric Energy, Metallurgy, Fertilizer etc. It is used as a scale and corrosion inhibitor in circulating cold water systems in areas such as oil field and low pressure boilers. HEDP (Hydroxyethylidene Diphosphonic acid) to prevent the formation of scales contaminating heat transfer surfaces in industrial water treatment systems such as cooling, boiler water treatment. HEDP (Hydroxyethylidophosphonic acid), To prevent the precipitation of Fe (Iron) and Mn (Manganese) Oxides in municipal water systems. HEDP (Hydroxyethylidene Diphosphonic acid), for inhibition on scales for desalination i.e. removal. HEDP (Hydroxyethylidene Diphosphonic acid), For Stain and Scale control in swimming pools. HEDP (Hydroxyethylidene Diphosphonic acid) for peroxide bleach stabilization in Industrial and Institutional detergents class cleaners and Personal care products. HEDP (Hydroxyethylidene Diphosphonic acid) is a Chemical of choice in industrial water treatment versus phosphonates such as SHMP, due to its Hydrolytic stability and ability to be a scale inhibitor. HEDP (Hydroxyethylidene Diphosphonic acid) is the only phosphonate used in the treatment of Municipal water and Personal care products. HEDP (Hydroxyethylidophosphonic acid) is used as a drinking water additive at some rates in some countries. HEDP (Hydroxyethylidene Diphosphonic acid) is used as metal and non-metal detergent in light weaving industry. HEDP (Hydroxyethylidene Diphosphonic acid) is used as a Peroxide stabilizer and dye fixing agent in the paint industry. HEDP (Hydroxyethylidene Diphosphonic acid) is used as a chelating agent in electroplating without cyanide. HEDP (Hydroxyethylidophosphonic acid) belongs to the class of Chemicals called phosphonates added to water to increase the solubility of certain ions and prevent the precipitation of certain mineral compounds. Some phosphonates and polyphosphates as 'Chelating Agents' are used to treat water systems by inactivating metal ions in water. HEDP (Hydroxyethylidene Diphosphonic acid) has a unique Chemical formula and physical properties. HEDP Soluble in water. HEDP It is white or pale yellow in color. One of the most important features of HEDP is chloride level less than 0.1%. HEDP is generally sold in a 60% aqueous solution. HEDP (Hydroxyethylidene Diphosphonic acid) is usually produced in glass lined reactors using phosphorous acid or phosphorus trichloride as raw materials. They produce Acetic Acid (CH3COOH) jointly in both processes. 1-10 mg / L dosage scale inhibitor, 10-50 mg / L dosage corrosion inhibitor, 1000-2000 mg / L dosage Generally used with HEDP (Hydroxyethylidene Diphosphonic acid) polycarboxylic acid as detergent. HEDP,  etidronik asit ve etidronat isimleriylede bilinen;  ilaç, deterjan, su arıtma ve kozmetik alanlarında  kullanılan sarı renkli sıvı yapıda bir bisfosfonattır. HEDP ilk olarak 1966'da patenti alınmış olup  ve 1977'de tıbbi kullanım için onaylanmıştır. HEDP, elektrik enerjisi, kimya endüstrisi, metalurji ve malzeme alanında , gübreler  gibi alanlarda dolaşan soğuk su sistemi, petrol sahası ve düşük basınçlı kazanlarda beton, kireç ve korozyon inhibisyonunda geciktirici olarak kullanılır. Boya endüstrisinde, HEDP peroksiti dengeleyici ve boya stabilizasyon  maddesi olarak kullanılır; Siyanür olmayan elektrokaplamada, HEDP şelatlayıcı ajan olarak kullanılır. HEDP 1–10 mg / L dozajı, ölçek inhibitörü olarak, 10–50 mg / L, korozyon inhibitörü olarak ve 1000-2000 mg / L, konsantrasyonları  deterjan olarak tercih edilir. Yaygın olarak, HEDP indirgeyici ajan olarak işlev gördüğü polikarboksilik asit (süperplastikleştirici) ile birlikte kullanılır. HEDP is a bisphosphonate used to strengthen bones, treat osteoporosis, and treat Paget's disease of bone. Bisphosphonates reduce osteoclastic activity, which inhibits bone absorption first, thereby moving the bone absorption-formation balance in the direction of formation, thus making the bone stronger for a long time. HEDP is a penetrating agent. It can be discharged as a component of gray wastewater and potentially contaminate groundwater resources; It can be added against the effects of substances such as calcium, iron or other metal ions or against their effects up to a certain level. As a phosphonate, HEDP has anti-corrosive properties on unalloyed steel. Etidronic acid (HEDP) also delays lipid oxidation of fatty acids. HEDP and its salts are added to detergents and other hygiene items to prevent the effects of hard water. It is also used in peroxide bleaching to prevent degradation of peroxides by transition metals. HEDP is among swimming pool chemicals. It is used as an anti-stain agent to prevent metal ions from coming out of solution and staining the edges of swimming pools They are water treatment chemicals that are very heavily used in many industrial processes such as phosphonates, dispersants, bleaching agents or scale and corrosion inhibitors. In many of these applications, HEDP (Hydroxyethylidophosphonic acid) can react with divalent cations such as calcium to form stable divalent cation phosphonate precipitates.HEDP (Hydroxyethylidene Diphosphonic acid) is an organophosphoric acid inhibitor. It can bind with Zn (Zinc), Cu (Copper) and Fe (Iron) ions to form complex compounds. It can dissolve oxidized materials on these metals. HEDP (Hydroxyethylidophosphonic acid) shows excellent scale and corrosion inhibiting effects under 250 ° C. HEDP (Hydroxyethylidene Diphosphonic acid) is difficult to hydrolyze under high pH value. And it has good Chemical stability, difficult to degrade under ordinary light and heat conditions. HEDP (Hydroxyethylidene Diphosphonic acid) has better Acid / Alkali and Chlorine oxidation tolerance than other organophosphoric acids (salts). HEDP (Hydroxyethylidene Diphosphonic acid) can form hexa-element chelating complex by reacting with metal ions in the water system, especially with calcium ion. HEDP (Hydroxyethylidene Diphosphonic acid) belongs to the class of Chemicals called phosphonates added to water to increase the solubility of certain ions and prevent precipitation of certain mineral compounds. Some phosphonates and polyphosphates as 'Chelating Agents' are used to treat water systems by inactivating metal ions in water. HEDP (Hydroxyethylidene Diphosphonic acid) has a unique Chemical formula and physical properties. It is soluble in water. It is white or pale yellow in color. One of the most important features of HEDP is chloride level less than 0.1%. HEDP is generally sold in 60% aqueous solution.