Tetrabutylphosphonium hydroxide solution
Tetrabutylphosphonium hydroxide solution (CAS: 14518-69-5), with the linear formula (CH3CH2CH2CH2)4P(OH), is a strong organic base supplied by Tech Serve Solutions. This aqueous solution, typically at 40 wt.%, is characterised by its high alkalinity. It serves as a valuable reagent in various chemical synthesis applications, particularly where a soluble, non-metallic hydroxide is required. Its properties make it suitable for organic reactions and as a phase-transfer catalyst precursor.
- IUPAC
- TBPH

Organic Synthesis Reagent
Tetrabutylphosphonium hydroxide is employed as a strong base in numerous organic transformations. It can be used in deprotonation reactions and as a catalyst in condensation and alkylation processes, offering a soluble alternative to inorganic hydroxides.
Phase Transfer Catalysis
As a precursor to phosphonium salts, tetrabutylphosphonium hydroxide can play a role in the generation of phase transfer catalysts. These catalysts facilitate reactions between reactants located in different phases, improving reaction efficiency and yield.
Polymerisation Initiator
In certain polymerisation processes, strong organic bases like tetrabutylphosphonium hydroxide can act as initiators or co-initiators. Its specific applications in this area depend on the polymer system and desired properties.
| Molecular weight | 276.44 |
|---|---|
| Linear formula | (CH3CH2CH2CH2)4P(OH) |
| Density | 0.989 g/mL at 25 °C |
| Refractive index | n20/D 1.412 |
| Concentration | 40 wt. % in H2O |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Transport (UN / ADR) | UN 3267 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-36/37/39-45 |
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 Tetrabutylphosphonium hydroxide solution used for?
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Tetrabutylphosphonium hydroxide solution is primarily used as a strong organic base in chemical synthesis, including organic reactions, and as a potential precursor for phase transfer catalysts.
What is the CAS number and formula for Tetrabutylphosphonium hydroxide solution?
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The CAS number is 14518-69-5, and its linear formula is (CH3CH2CH2CH2)4P(OH).
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Tetrabutylphosphonium hydroxide solution at a concentration of 40 wt. % in water. We do not represent this product as USP, BP, or EP grade; it is typically supplied for research and industrial synthesis purposes.
How should Tetrabutylphosphonium hydroxide solution be handled?
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This compound is corrosive and causes severe skin burns and eye damage (H314). Always handle with appropriate personal protective equipment, including gloves, eye protection (goggles and face shield), and respiratory protection. Ensure adequate ventilation and have emergency procedures in place.
How is Tetrabutylphosphonium hydroxide solution packed and shipped?
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Tetrabutylphosphonium hydroxide solution is classified under UN 3267, Class 8, Packing Group II, for transport. It is carefully packed according to international regulations for hazardous materials to ensure safe shipping and export.
How can I request a quote or sample?
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To request a quote or sample of Tetrabutylphosphonium hydroxide solution, please contact our sales team through the website or by phone, providing your specific requirements and contact information.
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