HEDP - Scale and Corrosion Inhibitor | Hebei Longke Water Treatment Co., Ltd.

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

Introduction to HEDP

HEDP (1-Hydroxy Ethylidene-1,1-Diphosphonic Acid) is a versatile organophosphonic acid compound that has become a cornerstone in modern water treatment and industrial corrosion prevention systems. As a scale and corrosion inhibitor, HEDP offers exceptional performance in diverse applications ranging from power generation to textile processing.

Key Technical Specifications

Item	Technical Specifications (Aqueous Solution)	Technical Specifications (Crystal Powder)
Appearance	Clear, Colorless to pale yellow aqueous solution	White crystal powder
Active Content (HEDP)	58-62%	≥90.0%
Active Content (HEDP·H2O)	-	≥98.0%
Phosphorous Acid (as PO33-)	≤2.0%	≤0.8%
Phosphoric Acid (as PO43-)	≤0.8%	≤0.5%
Chloride (as Cl-)	≤0.02%	≤0.01%
pH (1% solution)	≤2.0	≤2.0
Density (20℃)	≥1.40 g/cm3	-
Iron Content (Fe)	≤20.0 mg/L	≤10.0 mg/L
Color (APHA)	≤40.0	-
Calcium Sequestration	≥500 mg CaCO3/g	-

Technical Advantages and Performance

HEDP demonstrates exceptional corrosion inhibition and scale prevention capabilities under extreme conditions. Its unique molecular structure enables it to form stable chelate complexes with metal ions such as Fe³⁺, Cu²⁺, and Zn²⁺, effectively dissolving oxide layers on metal surfaces. This property makes HEDP particularly effective in high-temperature environments up to 250℃.

According to NIST standards for industrial water treatment chemicals, HEDP exhibits superior chemical stability under high pH conditions and demonstrates resistance to hydrolysis and decomposition under normal light and heat conditions. Its compatibility with chlorine oxidizers and alkaline environments outperforms traditional organophosphonic acids.

Applications in Industrial Systems

HEDP's versatility is evident in its wide range of applications:

• Circulating Cooling Systems: Effective scale and corrosion control in power plants, chemical facilities, and metallurgical operations
• Oil Fields: Prevents mineral deposition in production equipment and pipelines
• Low-Pressure Boilers: Protects against scale formation in boiler systems
• Textile Industry: Used as metal and non-metal detergent
• Dyeing Industry: Acts as peroxide stabilizer and dye-fixing agent
• Electroplating: Functions as chelating agent in non-cyanide plating solutions

For optimal performance, HEDP is typically used in conjunction with polycarboxylic acids to achieve synergistic effects. Recommended dosages range from 1-10 mg/L for scale inhibition, 10-50 mg/L for corrosion protection, and 1000-2000 mg/L as a cleaning agent.

Product Packaging and Storage

HEDP is available in two primary forms:

• Liquid Form: 200L plastic drums, IBC (1000L), and custom packaging
• Crystal Powder: 25kg/bag, with customizable packaging options

Storage requirements: 12 months in a shaded, dry environment. The product's high purity makes it suitable for specialized applications in the electronics industry and as an additive in daily chemical products.

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

As a leading manufacturer of water treatment chemicals, Hebei Longke Water Treatment Co., Ltd. has established itself as a reliable supplier of high-quality scale and corrosion inhibitor chemicals. With a focus on innovation and quality control, the company provides solutions for various industrial applications including:

• Industrial water treatment systems
• Boiler protection solutions
• Corrosion prevention for metal processing
• Specialized chemical formulations for textile and dyeing industries

The company's commitment to quality is reflected in its rigorous production standards and comprehensive product testing protocols.

Safety and Handling

HEDP is an acidic compound and requires proper safety precautions during handling:

• Wear appropriate personal protective equipment (PPE)
• Avoid contact with eyes and skin
• Immediately rinse with water if contact occurs

For detailed safety information, refer to the product safety data sheet.

Conclusion

HEDP represents a significant advancement in water treatment chemistry, offering a comprehensive solution for corrosion and scale control in demanding industrial environments. Its technical advantages, including exceptional chemical stability, broad pH compatibility, and synergistic effects with other treatment chemicals, make it an essential component in modern water management systems.

For more information about HEDP and its applications, visit Hebei Longke Water Treatment Co., Ltd.'s product page.

References

National Institute of Standards and Technology (NIST) - Technical standards for industrial water treatment chemicals

Hebei Longke Water Treatment Co., Ltd. - Product specifications and technical data