Description

Phosphonothioic Acid, Methyl-, o-Cyclopentyl Ester (9Ci) is a specialized organophosphorus compound characterized by its phosphonothioate ester structure. This chemical serves as a valuable intermediate and ligand in advanced synthesis and catalysis, offering unique reactivity for constructing complex molecular architectures. It is primarily sought by research institutions and industrial R&D departments in the agrochemical and pharmaceutical sectors for developing novel active ingredients and fine chemicals.

Application

• Agrochemical Intermediate: A key building block in the synthesis of novel insecticides, herbicides, and plant growth regulators that leverage its phosphonothioate moiety.
• Pharmaceutical Research: Used as a precursor or ligand in medicinal chemistry for developing potential therapeutic agents, particularly in protease inhibitor research.
• Catalysis & Ligand Chemistry: Functions as a ligand or co-catalyst in transition metal-catalyzed reactions, such as cross-coupling or asymmetric hydrogenation.
• Flame Retardant Synergy: Investigated as a synergistic component in advanced flame retardant formulations for polymers and textiles.
• Material Science Precursor: Employed in the surface modification of materials or the synthesis of functionalized polymers and coatings.
• Chemical Synthesis Reagent: Utilized in organic synthesis for introducing the thiophosphonate functional group into target molecules.

Basic Information

Product Name	Phosphonothioic Acid, Methyl-, o-Cyclopentyl Ester (9Ci)
CAS No.	138657-60-0
Molecular Formula	C6H13O2PS
Molecular Weight	180.21 g/mol
Synonyms	Methyl-o-cyclopentyl phosphonothioate; o-Cyclopentyl Methylphosphonothioate; Methylphosphonothioic Acid o-Cyclopentyl Ester; Cyclopentyl Methylphosphonothioate; Phosphonothioic Acid, Methyl-, Cyclopentyl Ester; CAS 138657-60-0
EINECS	Contact for details

Quality Control

Every batch of Phosphonothioic Acid, Methyl-, o-Cyclopentyl Ester (9Ci) is produced and analyzed under strict quality management protocols to ensure consistency and purity for research and development applications. Our products undergo rigorous quality testing, including chromatographic purity analysis and identity confirmation. Certificates of Analysis (COA) detailing batch-specific results are available upon request to support your quality assurance and regulatory documentation needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong bases and incompatible organic solvents. Handle and store under an inert atmosphere if prolonged storage is required to maintain optimal stability.

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)	1.15 - 1.25

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