Diethyl phenylphosphonite
Diethyl phenylphosphonite (CAS: 1638-86-4), with the molecular formula C6H5P(OC2H5)2 and a molecular weight of 198.20 g/mol, is a key organophosphorus compound. It serves as a valuable intermediate and reagent in organic synthesis, particularly in the development of novel phosphorus-containing materials and ligands for catalysis. Its properties make it suitable for various chemical transformations.
- IUPAC
- Diethoxyphenylphosphine
- Synonyms
- Diethoxyphenylphosphine

Ligand Synthesis for Catalysis
Diethyl phenylphosphonite is used as a precursor for synthesising phosphine ligands. These ligands are crucial components in homogeneous catalysis, enabling precise control over reaction selectivity and efficiency in various industrial chemical processes.
Organic Synthesis Intermediate
This compound functions as a versatile building block in complex organic synthesis. It facilitates the introduction of phosphorus moieties into organic molecules, leading to the creation of advanced materials and pharmaceutical intermediates.
Material Science Precursor
It can be employed in the development of novel phosphorus-containing polymers and materials. These materials may exhibit unique properties beneficial for applications in electronics and specialty coatings.
| Molecular weight | 198.20 |
|---|---|
| Linear formula | C6H5P(OC2H5)2 |
| Assay | 97% |
| Density | 1.032 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.51(lit.) |
| Flash point | 113 °C / 235.4 °F |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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 phenylphosphonite used for?
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Diethyl phenylphosphonite is primarily used as an intermediate in organic synthesis and as a precursor for synthesizing phosphine ligands used in catalysis.
What are the CAS number and formula for Diethyl phenylphosphonite?
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The CAS number for Diethyl phenylphosphonite is 1638-86-4, and its molecular formula is C6H5P(OC2H5)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Diethyl phenylphosphonite with an assay of 97%. This product is not represented as USP, BP, EP, or other pharmacopoeia grades.
How should Diethyl phenylphosphonite be handled safely?
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Diethyl phenylphosphonite is combustible and has a flash point of 113 °C (235.4 °F). Handle in a well-ventilated area away from ignition sources. Refer to the Safety Data Sheet for comprehensive handling information.
How is Diethyl phenylphosphonite typically packed and exported?
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Diethyl phenylphosphonite is carefully packaged according to international shipping regulations to ensure safe handling and export. Specific packaging details are available upon request.
How can I request a quote or sample?
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To request a quote or sample of Diethyl phenylphosphonite, please contact our sales team through the website or by phone, providing your specific requirements.
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