Description

(1-Hydroxyethylidene)Bis-Phosphonic Acid Tetrasodium Salt is a highly effective organophosphonate scale and corrosion inhibitor. This versatile chelating agent is valued for its exceptional stability across a wide pH and temperature range, making it a critical component in water treatment formulations. It is primarily used by industrial manufacturers and water treatment specialists in sectors such as cooling systems, oilfield operations, and detergent production to control mineral scale and prevent metal corrosion.

Application

• Industrial Water Treatment: A key ingredient in cooling water, boiler water, and reverse osmosis systems to inhibit calcium carbonate, calcium sulfate, and barium sulfate scale formation.
• Oilfield Chemistry: Used in squeeze treatments and as an additive in drilling fluids and production chemicals to control scale in downhole and topside equipment.
• Detergent & Cleaning Formulations: Acts as a builder and chelant in industrial and institutional cleaning products to sequester hardness ions and enhance cleaning efficacy.
• Pulp & Paper Processing: Employed as a peroxide stabilizer and chelant in bleaching processes to improve efficiency and protect equipment from scale.
• Textile Processing: Used in bleaching and dyeing baths to sequester metal ions that can cause fabric discoloration or degrade peroxide bleaches.
• Metal Surface Treatment: Functions as a corrosion inhibitor and sequestrant in metal cleaning, plating, and pickling solutions.

Basic Information

Product Name	(1-Hydroxyethylidene)Bis-Phosphonic Acid Tetrasodium Salt
CAS No.	3794-83-0
Molecular Formula	C2H4Na4O10P2
Molecular Weight	345.93 g/mol
Synonyms	HEDP•Na4; Tetrasodium Etidronate; Tetrasodium (1-Hydroxyethylidene)diphosphonate; Tetrasodium 1-Hydroxyethane-1,1-diphosphonate; PBTC Na4 Salt; Dequest 2016; Briquest ADPA-60SH; Phosphonic acid, (1-hydroxyethylidene)bis-, tetrasodium salt
EINECS	223-267-5

Quality Control

Our production of (1-Hydroxyethylidene)Bis-Phosphonic Acid Tetrasodium Salt adheres to stringent quality management protocols. Every batch is tested against established internal specifications to ensure consistent performance, purity, and stability. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical parameters is provided with each shipment to guarantee supply reliability and product traceability.

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 product 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
Identification (IR)	Conforms
Assay (HEDP•Na4)	≥ 94.0 %
pH (1% aqueous solution)	10.0 - 12.0
Water Content	≤ 6.0 %
Chloride (as Cl)	≤ 0.1 %
Iron (Fe)	≤ 10 ppm

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