Description

Etidronic Acid is a high-purity organophosphorus compound, also known as 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP). This versatile chemical serves as a highly effective chelating agent and scale inhibitor, valued for its ability to control mineral deposition and corrosion in aqueous systems. It is essential for industrial water treatment, detergent formulations, and as a stabilizing agent in personal care products, meeting the stringent demands of chemical manufacturing, oilfield operations, and the cosmetics industry.

Application

• Industrial Water Treatment: Primary application as a highly effective scale and corrosion inhibitor in cooling water systems, boilers, and reverse osmosis membranes.
• Detergent & Cleaning Formulations: Acts as a builder and chelating agent to sequester calcium and magnesium ions, enhancing cleaning efficiency and preventing scale in automatic dishwashing and laundry products.
• Oilfield Chemistry: Used in drilling fluids, fracturing fluids, and squeeze treatments to prevent scale formation in downhole equipment and pipelines.
• Personal Care & Cosmetics: Functions as a stabilizing agent and chelator in shampoos, liquid soaps, and other formulations to improve shelf life and product clarity.
• Pulp & Paper Industry: Employed in bleaching processes to chelate metal ions that can catalyze the decomposition of bleaching agents like hydrogen peroxide.
• Textile Processing: Used as a stabilizer and sequestrant in dyeing and bleaching baths to improve color fastness and process efficiency.
• Industrial Cleaning: Key component in acid cleaning formulations for metal surfaces and equipment to prevent re-deposition of dissolved salts.
• Agriculture: Utilized in certain fertilizer and micronutrient formulations to improve nutrient availability.

Basic Information

Product Name	Etidronic Acid
CAS No.	2809-21-4
Molecular Formula	C2H8O7P2
Molecular Weight	206.03 g/mol
Synonyms	1-Hydroxyethylidene-1,1-diphosphonic Acid (HEDP); (1-Hydroxyethylidene)bisphosphonic Acid; Etidronate; Dequest 2010; Briquest ADPA-60A; Phosphonic acid, (1-hydroxyethylidene)bis-; HEDP.A; HEDPA
EINECS	220-552-8

Quality Control

Our Etidronic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, pH, and impurity profiles are provided to guarantee consistent quality and supply reliability for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure containers are sealed immediately after use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White crystalline powder or colorless to pale yellow aqueous solution
Identification (IR)	Conforms
Assay (HEDP)	≥ 58.0 % (as aqueous solution) / ≥ 98.0 % (as solid)
pH (1% aqueous solution)	~ 2.0
Phosphite (as PO33-)	≤ 0.5 %
Iron (Fe)	≤ 10 ppm
Chloride (Cl)	≤ 50 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.