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HEDP 98%
SINOBIO
3808940090
CAS No. 2809-21-4
Molecular Formula: C2H8O7P2
Molecular weight: 206.02
Hazard class/UN No./Packaging: UN 3265 8/PG III
Structural Formula:
HEDP (hydroxyethylidene diphosphonic acid), a highly effective organophosphate corrosion inhibitor, has demonstrated outstanding performance in metal protection. It possesses strong chelating properties, tightly binding to metal ions such as iron (Fe), copper (Cu), and zinc (Zn), forming highly stable chelate compounds. This property enables HEDP to effectively dissolve oxide layers adhering to metal surfaces, restoring the metal's original luster and performance.
Notably, HEDP maintains its excellent scale and corrosion inhibition effectiveness even at extreme temperatures of up to 250°C, providing a powerful protective barrier for industrial equipment operating in high-temperature environments. HEDP also exhibits excellent chemical stability, resisting hydrolysis even in high pH environments. It also remains stable under normal light and heat conditions, resisting decomposition.
Compared to other organophosphate compounds, HEDP exhibits superior resistance to acids, alkalis, and chlorine oxidation, and can withstand a wider pH range and more oxidizing environments without losing its activity. Particularly noteworthy is HEDP's ability to react with metal ions, particularly calcium ions, in water systems to form a six-membered ring-shaped chelate complex. This unique reaction mechanism endows HEDP with exceptional antiscaling properties and a significant threshold effect, effectively preventing scale formation even at low concentrations.
When combined with other water treatment chemicals, HEDP exhibits excellent synergistic effects, enhancing overall treatment effectiveness and broadening its application range, making water treatment processes more efficient and economical.
The core advantages of HEDP 98% (98% pure hydroxyethylidene diphosphonic acid) lie in its high purity, high performance, environmentally friendly low-phosphorus content, high-temperature resistance, wide pH stability, and synergistic effects with a variety of water treatment agents. These advantages make it a preferred agent for industrial water treatment, metal protection, and other environmentally demanding applications. Detailed analysis is as follows:
*High Active Ingredient Content: HEDP 98% is much purer than its liquid form (e.g., 60% concentration), providing more active ingredients at the same dosage, significantly improving scale and corrosion inhibition.
*High Efficiency at Low Dosage: Experiments have shown that only 5-7 mg/L of HEDP in solution is required to achieve high scale inhibition rates. This efficiency increases with increasing concentration, but there is a critical threshold to avoid excessive use, which can lead to cost waste or performance degradation.
*Outstanding Economical Performance: While the unit price of high-purity products may be higher, the cost per active ingredient is lower, resulting in lower operating costs with long-term use.
*Extreme Temperature Adaptability: HEDP remains active at temperatures up to 250°C, making it particularly suitable for high-temperature environments such as boiler water and heat exchange systems. Experiments have shown that, in the absence of oxygen, significant decomposition occurs only at temperatures above 200°C, making it far superior to traditional scale inhibitors.
*Wide pH Range: HEDP is stable within the pH range of 2-12. While it may decompose in strongly acidic environments (e.g., pH < 2), it performs excellently in neutral and alkaline conditions, outperforming most organophosphonic acids (e.g., ATMP, which readily hydrolyzes in strong acid).
*Low Phosphorus Content: Compared to high-phosphorus scale inhibitors (e.g., sodium tripolyphosphate), HEDP has a lower risk of phosphorus emissions, and its hydrolysis products are microbially degradable, complying with environmental regulations such as EU REACH.
*No Risk of Phosphorus Exceedance: HEDP is a preferred choice in environmentally stringent industries such as drinking water treatment, industrial wastewater treatment, food processing, pharmaceuticals, and electronics.
*Diverse Scale Inhibition Mechanisms:
-Chelation: Forms hexacyclic chelates with metal ions such as calcium, magnesium, and iron, preventing inorganic salt deposition.
-Lattice Distortion: Interferes with crystal growth, inhibiting the formation of scales such as calcium carbonate and calcium sulfate.
-Threshold Effect: Effectively inhibits scale at low concentrations (1-10 mg/L), making it highly economical.
*Dual Corrosion Inhibition:
-Metal Surface Film Formation: Forms stable complexes with Fe²⁺, Zn²⁺, and Ca²⁺, forming a protective film on metal surfaces to slow corrosion.
-Chloride Ion Tolerance: Can withstand high chloride ion concentrations (residual chlorine must be controlled to <1 mg/L), inhibiting direct chloride ion corrosion on metals.
*Combination Optimization: Can be combined with polymer dispersants (such as PAA and HPMA), zinc salts, and oxidizing biocides (such as Cl₂) to enhance comprehensive water treatment effectiveness. For example, the HEDP+Zn²⁺+PAA formula performs exceptionally well in circulating cooling water systems.
*Versatility: It combines scale inhibition, corrosion inhibition, antioxidant properties, and dispersancy, reducing the need for additional chemicals and streamlining water treatment processes.
*Industrial Water Treatment: Circulating cooling water systems in the power, chemical, metallurgical, and fertilizer industries, as well as medium- and low-pressure boilers, oilfield injection water, and oil pipelines.
*Metal and Non-metal Cleaning: It serves as a cleaning agent for metals and non-metals in the textile industry and as a peroxide stabilizer and dye fixative in the dyeing and bleaching industry.
*Cyanide-Free Electroplating: It acts as a complexing agent in the preparation of cyanide-free copper electroplating solutions for direct copper plating on steel, resulting in excellent adhesion, smooth coatings, and a brilliant color.
*Reverse Osmosis Systems: It prevents scaling on membrane surfaces, extends membrane life, and ensures stable system operation.
HEDP 98% : 25kg, 25 MT with pallet, 27 MT without pallet.
Storage for one year in shady room and dry place.
CAS No. 2809-21-4
Molecular Formula: C2H8O7P2
Molecular weight: 206.02
Hazard class/UN No./Packaging: UN 3265 8/PG III
Structural Formula:
HEDP (hydroxyethylidene diphosphonic acid), a highly effective organophosphate corrosion inhibitor, has demonstrated outstanding performance in metal protection. It possesses strong chelating properties, tightly binding to metal ions such as iron (Fe), copper (Cu), and zinc (Zn), forming highly stable chelate compounds. This property enables HEDP to effectively dissolve oxide layers adhering to metal surfaces, restoring the metal's original luster and performance.
Notably, HEDP maintains its excellent scale and corrosion inhibition effectiveness even at extreme temperatures of up to 250°C, providing a powerful protective barrier for industrial equipment operating in high-temperature environments. HEDP also exhibits excellent chemical stability, resisting hydrolysis even in high pH environments. It also remains stable under normal light and heat conditions, resisting decomposition.
Compared to other organophosphate compounds, HEDP exhibits superior resistance to acids, alkalis, and chlorine oxidation, and can withstand a wider pH range and more oxidizing environments without losing its activity. Particularly noteworthy is HEDP's ability to react with metal ions, particularly calcium ions, in water systems to form a six-membered ring-shaped chelate complex. This unique reaction mechanism endows HEDP with exceptional antiscaling properties and a significant threshold effect, effectively preventing scale formation even at low concentrations.
When combined with other water treatment chemicals, HEDP exhibits excellent synergistic effects, enhancing overall treatment effectiveness and broadening its application range, making water treatment processes more efficient and economical.
The core advantages of HEDP 98% (98% pure hydroxyethylidene diphosphonic acid) lie in its high purity, high performance, environmentally friendly low-phosphorus content, high-temperature resistance, wide pH stability, and synergistic effects with a variety of water treatment agents. These advantages make it a preferred agent for industrial water treatment, metal protection, and other environmentally demanding applications. Detailed analysis is as follows:
*High Active Ingredient Content: HEDP 98% is much purer than its liquid form (e.g., 60% concentration), providing more active ingredients at the same dosage, significantly improving scale and corrosion inhibition.
*High Efficiency at Low Dosage: Experiments have shown that only 5-7 mg/L of HEDP in solution is required to achieve high scale inhibition rates. This efficiency increases with increasing concentration, but there is a critical threshold to avoid excessive use, which can lead to cost waste or performance degradation.
*Outstanding Economical Performance: While the unit price of high-purity products may be higher, the cost per active ingredient is lower, resulting in lower operating costs with long-term use.
*Extreme Temperature Adaptability: HEDP remains active at temperatures up to 250°C, making it particularly suitable for high-temperature environments such as boiler water and heat exchange systems. Experiments have shown that, in the absence of oxygen, significant decomposition occurs only at temperatures above 200°C, making it far superior to traditional scale inhibitors.
*Wide pH Range: HEDP is stable within the pH range of 2-12. While it may decompose in strongly acidic environments (e.g., pH < 2), it performs excellently in neutral and alkaline conditions, outperforming most organophosphonic acids (e.g., ATMP, which readily hydrolyzes in strong acid).
*Low Phosphorus Content: Compared to high-phosphorus scale inhibitors (e.g., sodium tripolyphosphate), HEDP has a lower risk of phosphorus emissions, and its hydrolysis products are microbially degradable, complying with environmental regulations such as EU REACH.
*No Risk of Phosphorus Exceedance: HEDP is a preferred choice in environmentally stringent industries such as drinking water treatment, industrial wastewater treatment, food processing, pharmaceuticals, and electronics.
*Diverse Scale Inhibition Mechanisms:
-Chelation: Forms hexacyclic chelates with metal ions such as calcium, magnesium, and iron, preventing inorganic salt deposition.
-Lattice Distortion: Interferes with crystal growth, inhibiting the formation of scales such as calcium carbonate and calcium sulfate.
-Threshold Effect: Effectively inhibits scale at low concentrations (1-10 mg/L), making it highly economical.
*Dual Corrosion Inhibition:
-Metal Surface Film Formation: Forms stable complexes with Fe²⁺, Zn²⁺, and Ca²⁺, forming a protective film on metal surfaces to slow corrosion.
-Chloride Ion Tolerance: Can withstand high chloride ion concentrations (residual chlorine must be controlled to <1 mg/L), inhibiting direct chloride ion corrosion on metals.
*Combination Optimization: Can be combined with polymer dispersants (such as PAA and HPMA), zinc salts, and oxidizing biocides (such as Cl₂) to enhance comprehensive water treatment effectiveness. For example, the HEDP+Zn²⁺+PAA formula performs exceptionally well in circulating cooling water systems.
*Versatility: It combines scale inhibition, corrosion inhibition, antioxidant properties, and dispersancy, reducing the need for additional chemicals and streamlining water treatment processes.
*Industrial Water Treatment: Circulating cooling water systems in the power, chemical, metallurgical, and fertilizer industries, as well as medium- and low-pressure boilers, oilfield injection water, and oil pipelines.
*Metal and Non-metal Cleaning: It serves as a cleaning agent for metals and non-metals in the textile industry and as a peroxide stabilizer and dye fixative in the dyeing and bleaching industry.
*Cyanide-Free Electroplating: It acts as a complexing agent in the preparation of cyanide-free copper electroplating solutions for direct copper plating on steel, resulting in excellent adhesion, smooth coatings, and a brilliant color.
*Reverse Osmosis Systems: It prevents scaling on membrane surfaces, extends membrane life, and ensures stable system operation.
HEDP 98% : 25kg, 25 MT with pallet, 27 MT without pallet.
Storage for one year in shady room and dry place.
