Description

Hydroxymethanediphosphonic Acid is a highly effective organophosphorus compound renowned for its superior chelating and scale inhibition properties. This powerful agent is critical for controlling unwanted mineral deposits and stabilizing metal ions in complex aqueous systems. It is essential for industrial water treatment, oilfield operations, and as a key intermediate in the synthesis of advanced functional materials.

Application

• Industrial Water Treatment: Primary application as a high-performance scale and corrosion inhibitor in cooling water, boiler water, and reverse osmosis systems.
• Oilfield Chemicals: Used in squeeze treatments and as a component in drilling fluids to prevent scale formation in downhole equipment and pipelines.
• Pulp & Paper Industry: Serves as a chelant in bleaching processes and a dispersant to control deposits.
• Textile Processing: Acts as a stabilizer and sequestrant in dyeing and bleaching baths to improve process efficiency and fabric quality.
• Metal Surface Treatment: Employed in cleaning and pickling formulations to chelate metal ions and prevent redeposition.
• Detergent & Cleaning Formulations: Functions as a builder to enhance cleaning power by inactivating water hardness ions.
• Chemical Synthesis: A valuable intermediate for producing more complex phosphonate derivatives and functional polymers.

Basic Information

Product Name	Hydroxymethanediphosphonic Acid
CAS No.	15468-10-7
Molecular Formula	C1H8O7P2 (often written as CH4O7P2)
Molecular Weight	186.03 g/mol
Synonyms	HMDP; Hydroxymethylenediphosphonic Acid; 1-Hydroxy-1,1-ethylidenediphosphonic Acid; HEDP (common industry name); Etidronic Acid (INN); (1-Hydroxyethylidene)bisphosphonic Acid; Dequest 2010; Briquest ADPA-60A
EINECS	239-492-7

Quality Control

Our Hydroxymethanediphosphonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, active content, and impurity profiles. A comprehensive Certificate of Analysis (COA) is provided with every shipment, detailing key parameters such as assay, phosphite content, pH, and clarity.

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); ensure containers are kept tightly sealed when not in use to prevent absorption of atmospheric moisture. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Assay (Active Acid, as HEDP)	≥ 60.0 %
pH (1% aqueous solution)	1.5 - 2.5
Density (20°C)	1.40 - 1.48 g/cm³
Phosphite (as PO3)	≤ 1.0 %
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.