Di-tert-butylphosphine oxide
Di-tert-butylphosphine oxide (CAS: 684-19-5), with the molecular formula C8H19OP and a molecular weight of 162.21 g/mol, is a valuable organophosphorus compound. It finds utility as a precursor in the synthesis of more complex phosphine ligands and organometallic complexes. Its chemical structure lends itself to applications in catalysis and various synthetic organic chemistry transformations, serving as a building block for specialised chemical research and development.

Phosphine Ligand Precursor
Serves as a key intermediate in the synthesis of diverse phosphine ligands used in homogeneous catalysis. These ligands are crucial for controlling reactivity and selectivity in metal-catalyzed reactions.
Organometallic Synthesis
Used in the preparation of organometallic compounds and complexes. These complexes can exhibit unique catalytic properties or find use in materials science applications.
Chemical Synthesis Building Block
Acts as a versatile building block in organic synthesis. Its reactivity allows for its incorporation into various molecular frameworks for the development of novel compounds.
Catalysis Research
Employed in research settings to explore new catalytic systems and reaction pathways. Its unique phosphorus-centred reactivity is of interest in developing advanced catalytic processes.
| Molecular weight | 162.21 |
|---|---|
| Empirical formula | C8H19OP |
| Melting point | 74-82 °C |

Hazard statements
- H228Flammable solid
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
| Transport (UN / ADR) | UN 1325 4.1 / PGII |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F |
| Risk statements (R) | 11 |
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 Di-tert-butylphosphine oxide used for?
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Di-tert-butylphosphine oxide (CAS: 684-19-5) is primarily used as a precursor in the synthesis of phosphine ligands and organometallic complexes. It also serves as a versatile building block in various chemical synthesis applications and catalysis research.
What are the CAS number and molecular formula for Di-tert-butylphosphine oxide?
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The CAS number for Di-tert-butylphosphine oxide is 684-19-5, and its molecular formula is C8H19OP.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Di-tert-butylphosphine oxide. The specific grade and purity are available upon request; we do not represent this product as USP, BP, or EP grade.
How should Di-tert-butylphosphine oxide be handled and stored safely?
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Di-tert-butylphosphine oxide is classified as flammable (H228). It should be kept away from heat, hot surfaces, sparks, open flames, and other ignition sources. Use explosion-proof electrical equipment and take precautionary measures against static discharge (P210).
How is Di-tert-butylphosphine oxide packed and shipped?
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Di-tert-butylphosphine oxide is shipped as UN 1325, Hazard Class 4.1, Packing Group II, adhering to stringent regulations for flammable solids.
How can I request a sample or quote for Di-tert-butylphosphine oxide?
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To request a sample or a quote for Di-tert-butylphosphine oxide, please contact our sales team through the website or direct email, providing your specific requirements.
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