Description

Phenyl-Phosphonothioic Acid Methyl Ester is a specialized organophosphorus compound that serves as a critical intermediate in advanced chemical synthesis. Its unique thiophosphonate ester structure makes it a valuable precursor for the development of flame retardants, agrochemicals, and ligands for metal catalysis. This high-purity intermediate is essential for R&D laboratories and production facilities in the pharmaceutical, agrochemical, and specialty polymer industries seeking to develop novel active ingredients and functional materials.

Application

• Agrochemical Intermediate: Key building block for the synthesis of novel insecticides, herbicides, and fungicides with thiophosphonate activity.
• Flame Retardant Synthon: Used in the production of phosphorus-based flame retardants for engineering plastics and textiles.
• Pharmaceutical Research: Serves as a precursor in medicinal chemistry for developing protease inhibitors and other biologically active molecules.
• Ligand Synthesis: Employed in the preparation of specialized ligands for transition metal catalysis and coordination chemistry.
• Polymer Modification: Acts as a functional monomer or additive to impart specific properties like flame resistance or metal chelation to polymers.
• Chemical Research: A versatile reagent for exploring new reactions in organophosphorus chemistry and material science.

Basic Information

Product Name	Phenyl-Phosphonothioic Acid Methyl Ester
CAS No.	42976-67-0
Molecular Formula	C7H9O2PS
Molecular Weight	188.18 g/mol
Synonyms	Methyl Phenylphosphonothioate; Methyl Phenylphosphonothioic Acid Ester; Phenylphosphonothioic Acid Methyl Ester; Methyl Phenylthiophosphonate; Phenyl(methyl)phosphonothioate; (Methyloxy)(phenyl)phosphinothioic Acid; Phosphonothioic acid, P-, methyl phenyl ester
EINECS	Contact for details

Quality Control

Our Phenyl-Phosphonothioic Acid Methyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including chromatography (HPLC/GC) and spectroscopic methods (NMR, IR), to ensure high chemical purity and identity confirmation. Certificates of Analysis (COA) documenting all critical quality parameters are available upon request, supporting compliance in regulated applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). This material is easily oxidized and should be stored under an inert atmosphere (e.g., nitrogen or argon) to maintain stability and prevent degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

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