1-Hydroxyethanediphosphonic acid sodium salt
[CAS# 29329-71-3]

Identification

• Classification: Organic raw materials >> Organic phosphine compound
• Name: 1-Hydroxyethanediphosphonic acid sodium salt
• Synonyms: 1-Hydroxyethane-1,1-diphosphonic acid sodium salt
• Molecular Formula: C₂H₈O₇P₂^.xNa
• CAS Registry Number: 29329-71-3
• EC Number: 249-559-4
• SMILES: CC(O)(P(=O)(O)O)P(=O)(O)[O-].[Na+]

Safety Data

• Hazard Symbols: GHS05;GHS07 Danger
• Hazard Statements: H302-H318-H319-H413
• Precautionary Statements: P264-P264+P265-P270-P273-P280-P301+P317-P305+P351+P338-P305+P354+P338-P317-P330-P337+P317-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Eye irritation	Eye Irrit.	2	H319
Acute toxicity	Acute Tox.	4	H302
Chronic hazardous to the aquatic environment	Aquatic Chronic	4	H413
Serious eye damage	Eye Dam.	1	H318
Skin irritation	Skin Irrit.	2	H315
Substances or mixtures corrosive to metals	Met. Corr.	1	H290
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410

Discovory and Applicatios

1-Hydroxyethanediphosphonic acid sodium salt, commonly referred to as HEDP-Na, is a phosphonic acid derivative that has garnered significant attention due to its unique properties and diverse applications. This compound is characterized by the presence of two phosphonic acid groups, which are essential for its chelating ability and stability. HEDP-Na was first synthesized in the mid-20th century, during a period of increasing interest in phosphonate chemistry and its potential industrial applications.

The synthesis of HEDP-Na typically involves the reaction of 1-hydroxyethane-1,1-diphosphonic acid with sodium hydroxide or sodium carbonate to form the sodium salt. The development of HEDP-Na was driven by the need for effective scale inhibitors and chelating agents in various industrial processes. As research progressed, the compound was recognized for its ability to bind metal ions, particularly calcium and magnesium, thereby preventing scale formation in water systems.

One of the primary applications of HEDP-Na is in water treatment processes. It is widely used as a scale inhibitor in cooling water systems, boilers, and industrial water circuits. By chelating metal ions that contribute to scale formation, HEDP-Na helps to maintain the efficiency and longevity of water systems, reducing maintenance costs and preventing downtime. This application is particularly important in industries such as power generation, petrochemicals, and manufacturing, where the presence of scale can significantly impact operational efficiency.

In addition to water treatment, HEDP-Na is utilized in the formulation of detergents and cleaning agents. Its ability to bind metal ions enhances the performance of these products by preventing the precipitation of calcium and magnesium salts, which can interfere with cleaning efficiency. As a result, HEDP-Na is commonly found in household and industrial cleaning formulations, contributing to improved cleaning power and effectiveness.

HEDP-Na also finds applications in the oil and gas industry, where it is used as a corrosion inhibitor and scale remover. Its chelating properties allow it to effectively bind metal ions that contribute to corrosion, thus protecting equipment and extending the lifespan of machinery. In oil field operations, HEDP-Na is employed to prevent scale deposits in pipelines and production equipment, ensuring smooth operations and minimizing the risk of costly repairs.

The agricultural sector also benefits from the use of HEDP-Na, particularly in the formulation of fertilizers and plant protection products. Its chelating properties enhance nutrient availability by improving the solubility of essential metals in soil, thereby promoting plant growth. By optimizing the bioavailability of nutrients, HEDP-Na plays a vital role in sustainable agricultural practices.

Despite its numerous applications, the environmental impact of HEDP-Na is an important consideration. Regulatory agencies have established guidelines for the safe use and disposal of phosphonates, including HEDP-Na, to mitigate potential risks to ecosystems. Ongoing research aims to evaluate the environmental fate of HEDP-Na and explore alternatives that may reduce any negative effects.

In summary, 1-hydroxyethanediphosphonic acid sodium salt is a versatile chemical compound with a wide range of applications in water treatment, cleaning agents, oil and gas operations, and agriculture. Its ability to chelate metal ions and prevent scale formation makes it a valuable component in various industrial processes. As research continues to advance, HEDP-Na remains a crucial player in enhancing efficiency and sustainability across multiple sectors.