Tributylmethylphosphonium dibutyl phosphate
Tributylmethylphosphonium dibutyl phosphate (CAS: 947601-89-0; C21H48O4P2; MW: 426.55) is a phosphonium-based ionic liquid. It is characterised by its specific properties making it suitable for various chemical synthesis applications. This compound serves as a versatile reagent in specialised organic transformations and advanced materials research. Its utility lies in its ability to act as a catalyst or reaction medium in specific synthetic pathways.
- IUPAC
- Methyltributylphosphonium dibutyl phosphate
- Synonyms
- Methyltributylphosphonium dibutyl phosphate

Ionic Liquid Applications
This phosphonium salt functions as an ionic liquid, offering a unique reaction medium for organic synthesis. Its properties can influence reaction rates and selectivity in various chemical transformations.
Specialty Chemical Synthesis
Utilised in specialised synthesis pathways, Tributylmethylphosphonium dibutyl phosphate can act as a reagent or catalyst. It is particularly relevant in the development of advanced organic molecules and materials.
Phosphonium Compound Research
As a distinct phosphonium derivative, this compound is valuable for research into phosphonium salts and their diverse chemical behaviours. It enables further investigation into organophosphorus chemistry.
| Molecular weight | 426.55 |
|---|---|
| Empirical formula | C21H48O4P2 |
| Assay | ≥95.0% (T) |
| Refractive index | n20/D 1.468 |
| Impurities tested | ≤0.5% water |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
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 Tributylmethylphosphonium dibutyl phosphate used for?
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Tributylmethylphosphonium dibutyl phosphate is primarily used in chemical synthesis, particularly within the realm of ionic liquids and as a specialty phosphonium compound for organic transformations.
What are the CAS number and chemical formula?
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The CAS number for Tributylmethylphosphonium dibutyl phosphate is 947601-89-0, and its chemical formula is C21H48O4P2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Tributylmethylphosphonium dibutyl phosphate with an assay of ≥95.0% (T). We do not represent this product as USP, BP, or EP grade.
How should Tributylmethylphosphonium dibutyl phosphate be handled?
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Handle with care to avoid skin and eye irritation, and respiratory tract irritation. Use appropriate personal protective equipment, including eyeshields and gloves, and ensure adequate ventilation. Refer to the Safety Data Sheet for detailed handling information.
Is this product available for export?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including Tributylmethylphosphonium dibutyl phosphate, and can facilitate international orders.
How can I request a sample or quote?
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To request a sample or a quote for Tributylmethylphosphonium dibutyl phosphate, please contact our sales team through the website or by phone.
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