Description

4-Methoxyphenylphosphonic Acid is a versatile organophosphorus compound featuring a phosphonic acid group attached to a methoxy-substituted benzene ring. This structure makes it a valuable building block and key intermediate in the synthesis of more complex molecules, particularly in advanced material science and pharmaceutical research. It is primarily sought after by R&D chemists and process development teams in the fine chemical, agrochemical, and material science industries.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and drug candidates, particularly those requiring phosphonate or phosphate ester functionalities.
• Ligand and Catalyst Synthesis: Serves as a precursor for creating specialized ligands used in metal catalysis and coordination chemistry.
• Material Science: Acts as a monomer or additive in the production of flame-retardant polymers, ion-exchange resins, and specialty coatings.
• Agrochemical Research: Employed as a key intermediate in developing novel herbicides, plant growth regulators, and other crop protection agents.
• Surface Modification: Used to functionalize surfaces (e.g., metals, oxides) with organic phosphonic acid layers for improved adhesion, corrosion resistance, or biocompatibility.
• Chemical Synthesis: A versatile reagent for constructing carbon-phosphorus bonds in organic synthesis, enabling the creation of complex molecular architectures.

Basic Information

Product Name	4-Methoxyphenylphosphonic Acid
CAS No.	21778-19-8
Molecular Formula	C7H9O4P
Molecular Weight	188.12 g/mol
Synonyms	(4-Methoxyphenyl)phosphonic Acid; p-Methoxyphenylphosphonic Acid; 4-Methoxybenzenephosphonic Acid; Phosphonic acid, P-(4-methoxyphenyl)-; p-Anisylphosphonic Acid
EINECS	Contact for details

Quality Control

Our 4-Methoxyphenylphosphonic Acid is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with each shipment, which includes data from techniques such as HPLC, NMR, and titration. Specifications are designed to meet the rigorous demands of research and industrial synthesis.

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); keep the container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 2.0%

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