Description

Methylphosphonothioic Acid o-Ethyl S-Isopentyl Ester is a specialized organophosphorus compound with a thiophosphonate ester structure. This chemical serves as a critical intermediate in the synthesis of advanced agrochemicals and pharmaceuticals, valued for its unique reactivity profile. It is primarily required by research and development chemists and process engineers in the fine chemical and active ingredient manufacturing sectors.

Application

• Key Intermediate in Agrochemical Synthesis: Used in the production of organophosphorus insecticides and herbicides.
• Pharmaceutical Intermediate: Serves as a building block for novel active pharmaceutical ingredients (APIs).
• Chemical Research & Development: Employed in academic and industrial R&D for studying phosphorylation reactions and developing new synthetic methodologies.
• Ligand and Catalyst Precursor: Utilized in the preparation of specialized ligands for metal catalysis.
• Flame Retardant Synthon: Acts as a precursor in the synthesis of certain flame-retardant additives.

Basic Information

Product Name	Methylphosphonothioic Acid o-Ethyl S-Isopentyl Ester
CAS No.	20845-72-1
Molecular Formula	C8H19O2PS
Molecular Weight	210.27 g/mol
Synonyms	O-Ethyl S-(3-Methylbutyl) Methylphosphonothioate; Ethyl Isopentyl Methylphosphonothioate; S-Isopentyl O-Ethyl Methylphosphonothioate; Methylphosphonothioic Acid, O-Ethyl S-(3-Methylbutyl) Ester; Phosphonothioic Acid, Methyl-, O-Ethyl S-(3-Methylbutyl) Ester; CAS 20845-72-1
EINECS	Contact for details

Quality Control

Our Methylphosphonothioic Acid o-Ethyl S-Isopentyl Ester is produced under stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including chromatographic purity analysis and structural confirmation, to ensure it meets the high standards required for synthetic intermediates. Certificates of Analysis (COA) detailing specific batch results are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Recommended storage temperature is 2-8°C for extended stability. The container should be kept tightly sealed to minimize moisture uptake and volatilization.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC/HPLC)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Specific Gravity (20°C)	~1.05 g/mL

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