Description

(1-Hydroxy-1-Phosphono-Ethyl)Phosphonic Acid is a high-purity, diphosphonic acid derivative valued for its excellent chelating and scale inhibition properties. Its unique molecular structure makes it a powerful sequestrant for di- and trivalent metal ions, such as calcium, magnesium, and iron. This compound is essential for formulators and manufacturers in the water treatment, detergent, and personal care industries seeking to prevent scale formation and improve product stability.

Application

• Industrial Water Treatment: A highly effective scale and corrosion inhibitor in cooling water, boiler water, and reverse osmosis systems.
• Detergent & Cleaning Formulations: Acts as a builder and chelating agent to enhance cleaning power by sequestering water hardness ions.
• Personal Care Products: Used in formulations for shampoos, soaps, and lotions as a stabilizer and to improve clarity.
• Pulp & Paper Processing: Serves as a chelant and dispersant to control metal ions and improve bleaching efficiency.
• Textile Auxiliary: Functions as a sequestering agent in dyeing and finishing processes to prevent metal-ion interference.
• Oilfield Chemicals: Employed in scale squeeze treatments and as a component in drilling fluid additives.
• Industrial Cleaning: Key ingredient in acid cleaners and metal surface treatment formulations for descaling and derusting.

Basic Information

Product Name	(1-Hydroxy-1-Phosphono-Ethyl)Phosphonic Acid
CAS No.	66052-91-3
Molecular Formula	C2H8O7P2
Molecular Weight	206.03 g/mol
Synonyms	1-Hydroxyethane-1,1-diphosphonic acid; HEDP; Etidronic acid; (1-Hydroxyethylidene)bisphosphonic acid; Phosphonic acid, (1-hydroxyethylidene)bis-; Dequest 2010; Briquest ADPA-60A; Unihib 106
EINECS	266-104-6

Quality Control

Our production of (1-Hydroxy-1-Phosphono-Ethyl)Phosphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure consistent purity, performance, and compliance with relevant industry standards. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, pH, and impurity levels.

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 material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Assay (as HEDP)	≥ 60.0%
pH (1% aqueous solution)	1.5 - 2.5
Density (20°C)	1.40 - 1.48 g/cm³
Phosphite (as PO33-)	≤ 0.5 %
Chloride (as Cl-)	≤ 0.01 %
Iron (as Fe)	≤ 10 ppm

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