Description

2-Hydroxyethyl Phosphonic Acid is an organophosphorus compound characterized by a phosphonic acid group and a hydroxyl group on a short carbon chain. This unique bifunctional structure makes it a versatile intermediate and functional additive, valued for its chelating and scale-inhibiting properties. It is essential for manufacturers in sectors requiring precise water treatment, metal surface modification, and specialty chemical synthesis.

Application

• Water Treatment Chemicals: Acts as an effective scale and corrosion inhibitor in industrial cooling and boiler water systems.
• Metal Surface Treatment: Used in formulations for cleaning, pickling, and phosphating baths to improve surface adhesion and corrosion resistance.
• Chelating Agent: Binds to metal ions (e.g., calcium, magnesium, iron) in various chemical processes and detergent formulations.
• Pharmaceutical & Cosmetic Intermediates: Serves as a building block in the synthesis of bioactive molecules and personal care ingredients.
• Textile & Leather Processing: Functions as a dispersing and sequestering agent in dyeing and tanning operations.
• Pulp & Paper Industry: Used in bleaching and processing to control metal ions and improve pulp quality.

Basic Information

Product Name	2-Hydroxyethyl Phosphonic Acid
CAS No.	22987-21-9
Molecular Formula	C₂H₇O₄P
Molecular Weight	126.05 g/mol
Synonyms	Hydroxyethylphosphonic Acid; (2-Hydroxyethyl)phosphonic Acid; Ethanol, 2-phosphono-; HEPA; Phosphonic acid, (2-hydroxyethyl)-; 1-Hydroxyethane-1,1-diphosphonic acid (common misnomer); Glycolylphosphonic Acid; 2-Phosphonoethanol
EINECS	245-374-1

Quality Control

Our 2-Hydroxyethyl Phosphonic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to guarantee consistency and support your quality assurance protocols.

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 product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture which may affect quality.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms
Assay (Titration)	≥ 95.0 %
Water Content (KF)	≤ 3.0 %
pH (1% aqueous solution)	1.5 - 2.5
Density (20°C)	1.40 - 1.50 g/cm³

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