Description

Diethyl Methylphosphonate is a versatile organophosphorus compound with the CAS number 683-08-9. It serves as a critical intermediate and reagent in advanced chemical synthesis, valued for its unique phosphorus-carbon bond. This chemical is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking to develop new active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of nucleotide analogs, antiviral agents, and other bioactive molecules.
• Agrochemical Synthesis: Precursor for certain classes of pesticides, herbicides, and plant growth regulators.
• Flame Retardant Formulations: Used as a component or synergist in flame-retardant materials for plastics and textiles.
• Ligand and Catalyst Preparation: Serves as a starting material for phosphonate-based ligands used in coordination chemistry and catalysis.
• Organic Synthesis Reagent: Employed in Horner-Wadsworth-Emmons (HWE) and other olefination reactions to construct complex organic frameworks.
• Chemical Research & Development: A valuable tool for exploring new reaction pathways and developing novel organophosphorus compounds.

Basic Information

Product Name	Diethyl Methylphosphonate
CAS No.	683-08-9
Molecular Formula	C5H13O3P
Molecular Weight	152.13 g/mol
Synonyms	Methylphosphonic Acid Diethyl Ester; Diethyl Methanephosphonate; Diethyl Methylphosphonate; Ethyl Methylphosphonate; DEMP; Methyl Diethoxyphosphine Oxide; (Diethoxyphosphoryl)methane; EINECS 211-667-3
EINECS	211-667-3

Quality Control

Our Diethyl Methylphosphonate is produced under stringent quality management systems. Each batch undergoes comprehensive analytical testing, including GC, NMR, and Karl Fischer titration, to ensure high purity and consistency. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming compliance with agreed specifications.

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); ensure containers are kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Density (20°C)	~1.090 g/cm³
Refractive Index (n20D)	~1.415

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