Description

Phenylphosphonic Acid CAS NO 1571-33-1 is a versatile organophosphorus compound characterized by a benzene ring directly bonded to a phosphonic acid group. This structure makes it a valuable intermediate and ligand in advanced chemical synthesis and material science. It is essential for manufacturers and researchers developing flame retardants, metal-chelating agents, and specialty polymers. Key industries that rely on this high-purity chemical include pharmaceuticals, agrochemicals, and electronics.

Application

• Pharmaceutical Intermediate: Used in the synthesis of novel active pharmaceutical ingredients (APIs) and prodrugs.
• Flame Retardant Synthon: Serves as a key building block for creating efficient, halogen-free flame retardant additives for polymers and textiles.
• Metal Chelation & Catalysis: Acts as a ligand for metal ions, useful in catalysis, wastewater treatment, and metal surface treatment processes.
• Polymer Modification: Employed to introduce phosphonic acid functional groups into polymers, enhancing properties like adhesion, thermal stability, and biocompatibility.
• Agrochemical Synthesis: An intermediate in the production of certain herbicides, plant growth regulators, and fungicides.
• Electronics & Semiconductor: Used in the formulation of etching solutions and as a precursor for dielectric and conductive layers in microelectronics.
• Research & Development: A crucial reagent in organic and inorganic chemistry research for constructing complex molecular architectures.

Basic Information

Product Name	Phenylphosphonic Acid
CAS No.	1571-33-1
Molecular Formula	C6H7O3P
Molecular Weight	158.09 g/mol
Synonyms	Benzenephosphonic Acid; PPA; Phosphonic Acid, Phenyl-; Phenylphosphonic Acid (mono); Monophenylphosphonic Acid; Benzene Phosphonic Acid; (Hydroxy)(phenyl)phosphinic acid; α-Hydroxybenzylphosphonic acid
EINECS	216-371-4

Quality Control

Our Phenylphosphonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and titration, to ensure high purity and consistency. We provide comprehensive Certificates of Analysis (COA) with every shipment, detailing all critical parameters. Our production adheres to cGMP principles where applicable, ensuring reliability for sensitive applications in pharmaceutical and electronic industries.

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 material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	158 - 162 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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