Description

Hydroxymethylene Diphosphonic Acid, Disodium Salt is a highly effective organophosphonate compound widely used as a scale and corrosion inhibitor in industrial water treatment systems. Its unique molecular structure provides superior sequestration of metal ions, such as calcium and magnesium, preventing the formation of insoluble deposits under demanding conditions. This product is essential for chemical suppliers, formulators, and plant operators in the power generation, oil & gas, and manufacturing sectors who require reliable performance to protect critical infrastructure and optimize operational efficiency.

Application

• Industrial Water Treatment: Primary application as a high-performance threshold scale inhibitor and corrosion control agent in cooling towers, boilers, and reverse osmosis systems.
• Oilfield Chemistry: Used in squeeze treatments and as an additive in drilling and completion fluids to control scale formation in downhole equipment and pipelines.
• Pulp & Paper Industry: Acts as a chelating agent and dispersant to control metal ion interference during bleaching processes and to prevent scale in paper machines.
• Detergent & Cleaning Formulations: Incorporated as a builder and sequestrant in industrial and institutional cleaning products to enhance efficacy in hard water.
• Textile Processing: Serves as a stabilizer and sequestrant in peroxide bleaching baths and dyeing processes to improve fabric quality and process consistency.
• Metal Surface Treatment: Used in electroplating and metal finishing baths to stabilize solutions and prevent precipitation of metal salts.

Basic Information

Product Name	Hydroxymethylene Diphosphonic Acid, Disodium Salt
CAS No.	14255-61-9
Molecular Formula	C1H4Na2O7P2
Molecular Weight	247.96 g/mol
Synonyms	Disodium Hydroxymethylenediphosphonate; HEDP, Disodium Salt; 1-Hydroxyethylidene-1,1-diphosphonic Acid Disodium Salt; Etidronic Acid Disodium Salt; (1-Hydroxyethylidene)bisphosphonic Acid Disodium Salt; Dequest® 2010; Briquest® ADPA-60SH; Phosphonic acid, (1-hydroxyethylidene)bis-, disodium salt
EINECS	238-144-1

Quality Control

Our Hydroxymethylene Diphosphonic Acid, Disodium Salt is manufactured under a strict quality management system. Each batch is tested to ensure it meets precise chemical and physical specifications relevant for industrial applications. A comprehensive Certificate of Analysis (COA) documenting purity, assay, pH, and other critical parameters is provided with every shipment to guarantee consistency and performance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which may lead to caking or reduced efficacy.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or granules
Assay (as active acid)	Min. 90.0%
pH (1% aqueous solution)	4.0 - 6.0
Identification (IR)	Conforms
Water Content	Max. 5.0%
Chloride (as Cl)	Max. 0.1%

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