Diethyl methylphosphonite
Diethyl methylphosphonite (CAS: 15715-41-0), with the molecular formula C5H13O2P and a molecular weight of 136.13 g/mol, is a phosphine compound. It serves as a valuable reagent in chemical synthesis, particularly in reactions involving phosphite ligands. This chemical is supplied with an assay of 97%, making it suitable for various research and development applications.
- IUPAC
- Diethoxymethylphosphine

Reagent in Organic Synthesis
Diethyl methylphosphonite functions as a versatile reagent in organic synthesis. Its phosphonite structure allows for participation in various coupling reactions and the formation of carbon-phosphorus bonds.
Phosphite Ligand Precursor
This compound can act as a precursor for synthesizing more complex phosphite ligands. These ligands are crucial in homogeneous catalysis, influencing the activity and selectivity of metal catalysts.
Research and Development
Utilised in academic and industrial research laboratories, diethyl methylphosphonite aids in exploring novel synthetic pathways and developing new organophosphorus compounds.
| Molecular weight | 136.13 |
|---|---|
| Empirical formula | C5H13O2P |
| Assay | 97% |
| Density | 0.907 g/mL at 25 °C |
| Refractive index | n20/D 1.419 |
| Storage temperature | 2-8°C |


Hazard statements
- H226Flammable liquid and vapour
- H302Harmful if swallowed
| Flash point | 29 °C / 84.2 °F |
|---|---|
| Transport (UN / ADR) | UN 1993C 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 10-22 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Diethyl methylphosphonite used for?
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Diethyl methylphosphonite is used as a reagent in chemical synthesis and as a precursor for phosphite ligands in catalysis.
What is the CAS number and formula for Diethyl methylphosphonite?
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The CAS number is 15715-41-0 and the empirical formula is C5H13O2P.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Diethyl methylphosphonite with an assay of 97%. We do not represent this product as USP, BP, or EP grade.
How should Diethyl methylphosphonite be handled?
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Diethyl methylphosphonite is a flammable liquid and vapour (H226) and is harmful if swallowed (H302). It should be handled with appropriate safety precautions in a well-ventilated area, away from ignition sources.
How is Diethyl methylphosphonite shipped?
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Diethyl methylphosphonite is classified as UN 1993, C3/PGIII, indicating it is a flammable liquid, and is packed and shipped according to relevant dangerous goods regulations.
How can I request a quote or sample?
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To request a quote or sample, please contact our sales team through the website or by phone, providing the product name and CAS number.
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