HEDP (Hydroxyethylidene Diphosphonic Acid)

CAS No. 2809-21-4

Molecular Formula: C2H8O7P2

Molecular weight: 206.02

Structural Formula:

HEDP Properties:

HEDP is a potent corrosion inhibitor that uses organophosphorus Acid to chelate with Fe, Cu, and Zn ions to form stable compounds. Its oxidation inhibitors are unparalleled at temperatures up to 250℃, and its chemical stability under high pH values is top-notch. It is also highly resistant to acid/alkali and chlorine oxidation, giving it an edge over other organophosphorus acid compounds.

HEDP forms hexa-element chelating complexes with calcium ions, making it an excellent antiscale agent for water treatment systems. This corrosion inhibitor works synergistically with other water treatment chemicals, giving excellent results.

This corrosion inhibitor also comes in a crystal powder solid state, making it suitable for winter use in freezing districts. In contrast, its high purity makes it sound like a cleaning agent in electronics fields and as an additive in daily chemicals.

Specification:

Usage:

Hydroxyethylidene phosphonic acid (HEDP) is a chelating and sequestering agent used in various industries. HEDP is commonly used as a metal ion sequestering agent and corrosion inhibitor in water treatment, cooling towers, and reverse osmosis systems. It can also be used as an emulsifier in agricultural products, a scale inhibitor, and a dispersant in papermaking process wastewater, detergents, and cleaning agents.

HEDP is used as scale and corrosion inhibition in circulating excellent water systems, oil fields, and low-pressure boilers in electric power, the chemical industry, metallurgy, fertilizer, etc. In the light woven industry, HEDP is used as a detergent for metal and nonmetal. HEDP is used as a peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP is used as a chelating agent. The dosage of 1-10mg/L is preferred as a scale inhibitor, 10-50mg/L as a corrosion inhibitor, and 1000-2000mg/L as a detergent. Usually, HEDP is used together with polycarboxylic Acid.

Package and Storage:

HEDP liquid: Normally, In a 250kg net Plastic Drum, an IBC drum can also be used as required
HEDP solid: 25kg inner liner polyethylene (PE) bag, outer Plastic woven bag, or client confirmation.
Storage for ten months in a room shady and dry place.

Safety Protection:

Acidity, Avoid contact with eye and skin; once contacted, flush with water.

Synonyms:

HEDP;HEDP(A);HEDPA;
Etidronic Acid;
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
Hydroxyethylidene-1,1-diphosphonicacid(HEDP);
1-Hydroxyethylidenediphosphonic Acid;
Hydroxyethylidene Diphosphonic acid(HEDP);
1-Hydroxy-1,1-Ethanediyl ester;
Oxyethylidenediphosphonic Acid(OEDP)
Оксиэтилидендифосфоновая кислота(ОЭДФ -кислота )

Get the Complete Phosphonates Antiscalant & Corrosion Inhibitor solution

The Role of HEDP in Water Treatment and its Significance for Wholesalers in Bulk

Water treatment is a crucial process undertaken by various industries to maintain the quality of water used and discharged. Among the many chemicals employed in water treatment processes, 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) plays an important role. This blog post explores the significance of HEDP in water treatment and why it is an essential chemical for companies looking to wholesale in bulk. Read on to discover the in-depth benefits and uses of HEDP in water treatment.

What is HEDP?

HEDP, with the chemical formula C₂H₈O₇P₂, is a water-soluble, odorless, and colorless organophosphorus compound. It is stable in high-temperature and high-pH environments, making it a versatile water treatment chemical. Due to its corrosion inhibition and scale-prevention properties, HEDP is widely used in the industrial, commercial, and residential sectors.

The Role of HEDP in Water Treatment

Corrosion Inhibition

Corrosion is a common issue in water treatment systems that affects the efficiency and lifespan of the equipment. HEDP acts as a corrosion inhibitor by forming a protective layer on metal surfaces, preventing the interaction between the metal and corrosive substances in the water. It works effectively across a wide pH range and can be used for various metals, including carbon steel, copper, and stainless steel.

Scale Prevention

Scale formation is another challenge water treatment systems face, leading to reduced efficiency and potential equipment failure. HEDP is a valuable asset in addressing this issue as it prevents scale deposits from forming on the equipment surfaces. Its unique molecular structure enables HEDP to bind with metal ions like calcium, magnesium, and iron, thus inhibiting their interaction with waterborne substances that cause scale.

Impurities Control

Apart from corrosion inhibition and scale prevention, HEDP aids in controlling the concentration of impurities in water systems. It is highly effective in dispersing metal oxides and other suspended solids, which ultimately helps maintain the quality of treated water. HEDP also enhances the performance of other water treatment chemicals such as biocides and coagulants.

Why Bulk Wholesalers should Invest in HEDP

Wide Range of Applications

The comprehensive benefits of HEDP make it suitable for use in various industries such as power plants, oil and gas, textiles, pulp and paper, and hospitality. This vast range of applications increases the demand for HEDP, making it a valuable product for bulk wholesalers.

Cost-Effective Solution

HEDP provides a cost-effective alternative to other water treatment chemicals, as it requires lower dosages to achieve the desired results. This cost efficiency and its effectiveness in addressing multiple water treatment issues make HEDP an attractive choice for wholesalers.

Regulatory Compliance

Adopting HEDP in water treatment processes ensures businesses comply with strict environmental regulations. By effectively managing corrosion, scale formation, and impurity control, HEDP helps industries reduce their environmental footprint, adhere to regulatory standards, and avoid potential financial penalties.

Conclusion

HEDP is a versatile and indispensable chemical in water treatment, thanks to its corrosion inhibition, scale prevention, and impurities control properties. By investing in and supplying HEDP in bulk, wholesalers can effectively cater to a wide range of industries and seize lucrative business opportunities. Emphasizing HEDP’s cost-effectiveness, efficiency, and regulatory compliance is vital when targeting companies looking for sustainable and high-performing water treatment solutions.

What is the chemical reaction of HEDP?

The efficacy of HEDP in various applications is attributed to its unique chemical structure, where it has two phosphonic acid groups bonded to a central carbon atom. The phosphonic acid moiety plays a crucial role in HEDP’s functionality, and a few factors govern its reactivity. The primary factors to consider are the metal ion’s nature and the solution’s pH.

Chelation: In water treatment processes where scale formation is a significant concern, HEDP forms stable complexes with metal cations such as Ca2+, Mg2+, Ba2+, and Sr2+. This chelation prevents metal ions’ precipitation, thus keeping the water systems free from scale build-up. HEDP’s chemical reaction during chelation can be generalized as:

HEDP + M²⁺ ⟶ HEDP-M

where M²⁺ is the divalent metal ion.

Passivation: HEDP’s ability to slow down corrosion in metals, especially steel and copper, is attributed to the adsorption of HEDP molecules onto the metal surface, leading to the formation of a passivation layer. This reaction can be represented as:

HEDP + Metal Surface ⟶ Metal Surface – HEDP

In an acidic solution, HEDP effectively prevents the dissolution of the metal by forming a stable complex with the metal ions, thus reducing the corrosion rate in the presence of oxygen.

The pH Dependence of the Chemical Reaction

The pH of the solution significantly impacts the functionality of HEDP. HEDP’s phosphonic acid groups in alkaline conditions tend to lose protons, giving rise to corresponding negatively charged ions. The chelating and corrosion inhibition properties of HEDP are usually associated with its ability to form metal complexes with the ionized form of phosphonic acid.

Thus, HEDP has excellent stability and performance at a wide range of pH values, making it a popular choice for multiple applications.

Conclusion

The chemical reaction of HEDP is governed by the chelation and passivation processes that make it an excellent scale and corrosion inhibitor across industries. With unmatched stability, versatility, and efficacy, it is clear why companies would want to wholesale HEDP in bulk. As a bulk wholesaler, it is crucial to understand the ins and outs of this versatile chemical, including its chemical reactions and how they contribute to its efficacy in various applications. This way, you can provide your clients with valuable information and high-quality products that meet their specific needs and contribute to their success.

Is HEDP organic?

A common misconception is that the term “organic” refers exclusively to substances originating from living organisms or those produced through natural processes. This definition is actually more appropriate for the term “natural.” Organic compounds, however, are chemicals containing carbon-hydrogen (C-H) bonds, often occurring naturally but also synthesized through chemistry.

By this definition, HEDP is an organic compound. Its molecular formula, C2H8O7P2, contains C-H bonds, oxygen (O), and phosphorus (P) atoms. While phosphorus is derived from inorganic phosphate minerals, its inclusion in HEDP as part of an organophosphorus compound makes HEDP an organic compound possessing both organic (carbon-based) and inorganic (phosphorus) elements.