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HEDP (1-Hydroxy Ethylidene-1,1-Diphosphonic Acid) CAS 2809-21-4 powder

HEDP (1-Hydroxy Ethylidene-1,1-Diphosphonic Acid) is a high-performance organic phosphonic acid corrosion and scale inhibitor, with CAS 2809-21-4. It is commonly available in powder form, which is easy to store, transport and apply in various industrial fields. This product has passed REACH registration, and MSDS download is available for customers to obtain detailed safety and technical information.

Product Synonyms

HEDP has multiple recognized synonyms in the global chemical industry, including 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, Hydroxyethylidene Diphosphonic Acid, HEDPA, 1-Hydroxyethane-1,1-diphosphonic Acid, Water Quality Stabilizer HEDP, and Etidronic Acid. These synonyms are widely used in international procurement and trade, ensuring easy identification and smooth communication between suppliers and buyers.

Product Properties

The molecular formula ofHEDP is $$C_2H_8O_7P_2$$, with a molar mass of 206.02 g/mol. It is a stable organic phosphonic compound with unique physical and chemical properties that make it suitable for a variety of industrial applications, especially in water treatment.

Physical Traits

HEDP appears as white crystalline powder in its solid form, while its aqueous solution is colorless to pale yellow transparent liquid. It is odorless, non-flammable and has strong hygroscopicity. The melting point of HEDP (crystalline form) is 190-192°C, and it decomposes above 250°C. It is easily soluble in water and ethanol, and soluble in other polar organic solvents. The pH value of its 1% aqueous solution is 1.5-2.0, showing weak acidity. It has excellent thermal stability, remaining effective at high temperatures and maintaining stability under high pH conditions without easy hydrolysis.

Product Specifications (Most Common Grade)

Product Applications

HEDP is a versatile organic phosphonic acid product with extensive applications in water treatment, chemical industry, electroplating and other fields, making it a popular choice for global importers and procurement companies:

Water Treatment: Used as an efficient corrosion and scale inhibitor in industrial circulating cooling water systems, medium and low pressure boilers, and oilfield water injection and oil pipeline systems. It can form stable complexes with various metal ions, especially calcium ions, to prevent scale formation and slow down metal corrosion, extending the service life of equipment.

Chemical & Textile Industry: Serves as a metal and non-metal cleaner, peroxide stabilizer and color fixative in the textile and dyeing industry. It also shows excellent synergistic effects when used in combination with other water treatment agents, improving overall treatment efficiency.

Electroplating Industry: Used as a complexing agent in cyanide-free electroplating, which can improve the adhesion and smoothness of the plating layer. It can also activate the surface of the plated parts before electroplating, enhancing the plating effect.

Other Fields: Used as an additive in daily chemicals, a carrier for radioactive elements in the medical industry, and a chelating agent in soap production to prevent yellow spots caused by metal ions.

FAQ

1. Is HEDP compatible with other water treatment agents?

HEDP has good compatibility with most water treatment agents, especially polycarboxylic acid scale inhibitors and dispersants. When used in combination, it can show ideal synergistic effects, significantly improving corrosion and scale inhibition performance. Detailed compatibility information is available in the MSDS, which can be accessed via MSDS download.

2. What is the recommended dosage of HEDP in different applications?

The dosage varies according to the application scenario: when used as a scale inhibitor, the recommended concentration is 1-10 mg/L; as a corrosion inhibitor, the recommended concentration is 10-50 mg/L; and as a cleaner, the recommended concentration is 1000-2000 mg/L. Specific dosages can be adjusted according to actual working conditions and water quality.

3. Does HEDP have any environmental impact?

HEDP is a low-toxic and environmentally friendly chemical, which meets international environmental standards. It is biodegradable under appropriate conditions and will not cause significant environmental pollution when used and discharged in accordance with specifications. This product is REACH registered, complying with EU environmental and chemical regulations.

This product is fully REACH registered, meeting EU chemical regulations and international safety standards. HEDP with CAS 2809-21-4 is a cost-effective, high-performance organic phosphonic acid product, widely trusted by global importers and procurement partners. MSDS download is available for customers to obtain all necessary safety and technical details.

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