HEDP-Corrosion Inhibitor&Scale Inhibitor

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 organophosphoric acid widely used as a scale and corrosion inhibitor in industrial water treatment systems. This compound is renowned for its ability to chelate with metal ions such as Fe, Cu, and Zn, forming stable complexes that prevent oxidation and scale formation. Its exceptional performance under high-temperature conditions (up to 250℃) and resistance to hydrolysis make it a preferred choice in demanding environments. Learn more about HEDP.

Key Features of HEDP

• Chelation Efficiency: HEDP forms stable hexa-element chelates with calcium ions, effectively preventing scale buildup in water systems.
• High Temperature Stability: Maintains efficacy at temperatures up to 250℃, making it suitable for industrial boilers and cooling towers.
• Chemical Stability: Resists decomposition under normal light and heat conditions, ensuring long-term performance.
• Acid-Alkali Resistance: Outperforms other organophosphoric acids in tolerance to acidic and alkaline environments.
• Low Toxicity: Safe for use in both industrial and electronic cleaning applications.

Technical Specifications

Items	Index (Liquid)	Index (Solid)
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	-
Fe, mg/L	20.0 max	10.0 max
Color APHA (Hazen)	40.0 max	-
Ca Sequestration (mg CaCO3/g)	500.0 min	-

Advantages of HEDP

HEDP offers multiple advantages over traditional corrosion and scale inhibitors:

• Enhanced Performance: Its chelating ability with calcium ions provides superior scale inhibition compared to other organophosphoric acids.
• Cost-Effectiveness: Reduces the need for frequent system maintenance and downtime, lowering operational costs.
• Environmental Friendliness: Low toxicity and biodegradability make it a sustainable choice for water treatment.
• Flexibility: Suitable for both liquid and solid forms, adapting to various industrial requirements.

Application Scenarios

HEDP is utilized across diverse industries for its multifunctional properties:

• Circulating Cooling Systems: Prevents scale and corrosion in power plants and chemical facilities.
• Oil Fields: Protects equipment from mineral deposits and oxidative damage.
• Low-Pressure Boilers: Ensures efficient heat transfer and extends boiler lifespan.
• Textile Industry: Acts as a detergent for metal and non-metal surfaces.
• Dyeing Industry: Stabilizes peroxides and enhances dye fixation.
• Electroplating: Functions as a chelating agent in non-cyanide processes.

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

Hebei Longke Water Treatment Co., Ltd. is a leading manufacturer specializing in water treatment chemicals, including HEDP. With a focus on innovation and quality, the company provides solutions for industrial, commercial, and environmental applications. Their commitment to research and development ensures that products like HEDP meet stringent industry standards. For more information, visit Hebei Longke's official website.

Usage Guidelines

HEDP is typically applied in the following concentrations:

• Scale Inhibitor: 1-10 mg/L
• Corrosion Inhibitor: 10-50 mg/L
• Detergent: 1000-2000 mg/L

For optimal results, HEDP is often used in conjunction with polycarboxylic acid to enhance its synergistic effects.

Packaging and Storage

HEDP is available in both liquid and solid forms:

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

Store in a cool, dry, and shaded area for up to 12 months.

Safety and Protection

HEDP is acidic and requires proper handling:

• Wear protective gloves and goggles during operation.
• Avoid contact with eyes and skin. Rinse immediately with water if exposed.

Related Products

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is a key product in the scale and corrosion inhibitor category, offering similar benefits to HEDP. Explore other scale and corrosion inhibitor chemicals for tailored solutions.

Authoritative Citations

According to the National Institute of Standards and Technology (NIST), water treatment chemicals like HEDP are critical for maintaining the efficiency and longevity of industrial systems. NIST's research on chemical stability and corrosion prevention underscores the importance of compounds with high thermal and chemical resistance. Learn more about NIST's standards.

Conclusion

HEDP is an indispensable solution for modern industrial water treatment. Its advanced chelation properties, stability, and versatility make it a preferred choice across multiple sectors. By leveraging the expertise of companies like Hebei Longke Water Treatment Co., Ltd., industries can ensure optimal performance and sustainability. For detailed specifications and product information, visit the HEDP product page.