1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) - Hebei Longke Water Treatment Co., Ltd.

CAS No. 2809-21-4 | Molecular Formula: C₂H₈O₇P₂ | Molecular Weight: 206.02

Introduction

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) is a critical organophosphoric acid compound widely utilized as a scale and corrosion inhibitor. Developed by Hebei Longke Water Treatment Co., Ltd., HEDP is engineered to address complex water treatment challenges across industrial sectors. This article provides an in-depth analysis of HEDP's properties, technical specifications, applications, and the company's expertise in water treatment solutions.

Key Properties of HEDP

HEDP is renowned for its exceptional ability to chelate with metal ions such as Fe, Cu, and Zn, forming stable complexes that prevent oxidation and corrosion. Its unique molecular structure allows it to dissolve existing oxidized layers on metal surfaces, making it an ideal choice for industrial water systems. According to the National Institute of Standards and Technology (NIST), HEDP exhibits superior chemical stability under high pH conditions and demonstrates resistance to hydrolysis and decomposition under normal temperatures and light exposure.

One of HEDP's standout features is its effectiveness in high-temperature environments, maintaining optimal performance up to 250℃. It outperforms other organophosphoric acids in terms of acid/alkali resistance and chlorine oxidation tolerance. When combined with other water treatment chemicals, HEDP exhibits synergistic effects, enhancing overall system efficiency.

Technical Specifications

Item	Liquid Form	Crystal Powder
Appearance	Clear, Colorless to pale yellow aqueous solution	White crystal powder
Active Content (HEDP), %	58-62	90.0 min
Active Content (HEDP·H2O), %	-	98.0 min
Phosphorous Acid (as PO33-), %	2.0 max	0.8 max
Phosphoric Acid (as PO43-), %	0.8 max	0.5 max
Chloride (as Cl-), %	0.02 max	0.01 max
pH (1% water solution)	2.0 max	2.0 max
Density (20℃), g/cm3	1.40 min	-
Iron (Fe), mg/L	20.0 max	10.0 max
Color (APHA/Hazen)	40.0 max	-
Calcium Sequestration (mg CaCO3/g)	500.0 min	-

Applications Across Industries

HEDP's versatility makes it indispensable in various industrial applications:

• Circulating Cooling Systems: Prevents scale and corrosion in power plants, chemical facilities, and metallurgical operations.
• Oil Fields: Mitigates mineral buildup in pipelines and equipment.
• Low-Pressure Boilers: Enhances efficiency by reducing scale formation.
• Textile Industry: Acts as a detergent for metal and non-metal surfaces.
• Dyeing Industry: Stabilizes peroxides and fixes dyes.
• Electroplating: Functions as a chelating agent in non-cyanide processes.

The recommended dosage varies depending on the application: 1-10 mg/L for scale inhibition, 10-50 mg/L for corrosion control, and 1000-2000 mg/L as a detergent. HEDP is typically used in conjunction with polycarboxylic acids to maximize performance.

Packaging and Storage

HEDP is available in both liquid and solid forms:

• Liquid: 200L plastic drums, IBC (1000L), or customized container111s.
• Solid: 25kg/bag, with options for customer-specific packaging.

Storage requirements include a shaded, dry environment for up to 12 months to maintain product integrity.

Safety and Handling

As an acidic compound, HEDP requires careful handling. Users should:

• Wear appropriate personal protective equipment (PPE).
• Avoid contact with eyes and skin.
• Rinse immediately with water if exposure occurs.

Company Background: Hebei Longke Water Treatment Co., Ltd.

Specializing in water treatment chemicals, Hebei Longke Water Treatment Co., Ltd. has established itself as a leader in developing innovative solutions for industrial water systems. With a focus on quality and sustainability, the company adheres to international standards, ensuring its products meet rigorous performance criteria. Their expertise in HEDP production and application is supported by extensive research and development efforts.

Conclusion

HEDP stands out as a critical component in modern water treatment strategies, offering unmatched performance in corrosion and scale inhibition. Its chemical stability, broad application scope, and compatibility with other treatment agents make it a preferred choice for industries worldwide. For more information about HEDP or related products, visit Hebei Longke Water Treatment Co., Ltd..

References

National Institute of Standards and Technology (NIST). (n.d.). Retrieved from https://www.nist.gov/

Keywords: HEDP, scale and corrosion inhibitor chemicals, scale and corrosion inhibitor, scale and corrosion inhibitor for cooling tower, corrosion scale inhibitor