Description

Phosphonic Acid CAS NO 53273-28-2 is a versatile organophosphorus compound, also known as phosphorous acid, valued for its dual functionality as a reducing agent and a source of phosphonate groups. Its importance lies in its ability to act as a highly effective scale and corrosion inhibitor in industrial water treatment systems, protecting critical infrastructure. This product is essential for manufacturers in the water treatment, agrochemical, and polymer industries, where it serves as a key intermediate and stabilizer.

Application

• Industrial Water Treatment: Primary application as a highly effective scale and corrosion inhibitor in cooling towers, boilers, and reverse osmosis systems.
• Agrochemical Synthesis: Key intermediate in the production of herbicides, fungicides, and plant growth regulators.
• Polymer Industry: Used as a stabilizer and antioxidant in the manufacture of polyesters, polyamides, and other plastics to prevent thermal degradation.
• Pharmaceutical Intermediates: Serves as a building block for synthesizing various active pharmaceutical ingredients (APIs) and nucleotide analogs.
• Metal Surface Treatment: Employed in metal finishing and plating baths for surface passivation and to improve coating adhesion.
• Flame Retardant Formulations: Acts as a component in intumescent coatings and flame-retardant materials for textiles and plastics.

Basic Information

Product Name	Phosphonic Acid
CAS No.	53273-28-2
Molecular Formula	H3O3P
Molecular Weight	82.00 g/mol
Synonyms	Phosphorous Acid; Orthophosphorous Acid; Dihydroxyphosphine Oxide; Phosphonate; Phosphorus(+3) Acid; Phosphorus Trihydroxide; Phosphorus(III) Acid; PA
EINECS	Contact for details

Quality Control

Our Phosphonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets the required specifications for purity, identity, and performance. Certificates of Analysis (COA) are provided with every shipment, detailing key parameters such as assay, water content, and impurity profiles. We adhere to relevant industry standards and can support compliance requirements for various global markets.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White crystalline solid or colorless solution
Identification (IR)	Conforms
Assay (Titration)	≥ 98.0 %
Water Content (KF)	≤ 1.0 %
Chloride (Cl)	≤ 0.01 %
Sulfate (SO4)	≤ 0.01 %
Heavy Metals (as Pb)	≤ 10 ppm

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