Description

1-Hydroxyethanediphosphonic Acid Sodium Salt is a highly effective organophosphorus compound widely recognized for its superior scale and corrosion inhibition properties. Its primary value lies in its ability to form stable complexes with metal ions, preventing scale formation and protecting industrial equipment even under demanding conditions. This makes it an essential chemical for water treatment specialists, industrial cleaning formulators, and manufacturers in sectors where process water quality and equipment longevity are critical.

Application

• Industrial Water Treatment: A key component in cooling water and boiler water treatment programs for scale and corrosion inhibition, particularly against calcium carbonate and calcium sulfate.
• Detergent & Cleaning Formulations: Used as a builder and chelating agent in industrial and institutional cleaning products to enhance cleaning efficiency by sequestering water hardness ions.
• Oilfield & Mining Chemicals: Employed in scale control for oilfield brine and as a mineral processing aid to prevent unwanted precipitation.
• Pulp & Paper Industry: Functions as a chelant and dispersant in bleaching processes and papermaking to control metal ions and improve pulp quality.
• Textile Processing: Used to sequester metal ions in dyeing and bleaching baths, preventing stains and ensuring consistent color quality.
• Personal Care Products: Incorporated as a stabilizer and chelating agent in formulations like shampoos and liquid soaps.

Basic Information

Product Name	1-Hydroxyethanediphosphonic Acid Sodium Salt
CAS No.	29329-71-3
Molecular Formula	C2H7NaO7P2 (for monosodium salt, typical)
Molecular Weight	227.99 g/mol (for monosodium salt)
Synonyms	HEDPS; Etidronic Acid Monosodium Salt; (1-Hydroxyethylidene)bisphosphonic Acid Sodium Salt; Sodium (1-Hydroxyethylidene)diphosphonate; Phosphonic acid, (1-hydroxyethylidene)bis-, sodium salt; Dequest 2010 (Trade Name); Sodium Etidronate; EHDP Sodium Salt
EINECS	249-558-5

Quality Control

Our 1-Hydroxyethanediphosphonic Acid Sodium Salt 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, pH, and chloride content. We adhere to relevant industrial standards and our quality protocols are designed to ensure batch-to-batch consistency for your formulations.

Storage

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

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Assay (as active acid)	≥ 90.0 %
pH (1% aqueous solution)	2.0 - 4.0
Chloride (as Cl)	≤ 0.5 %
Water Content	≤ 10.0 %
Identification (IR)	Conforms

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