Tetraphenylphosphonium chloride
Tetraphenylphosphonium chloride (CAS: 2001-45-8) is a phosphonium salt with the linear formula (C6H5)4P(Cl) and a molecular weight of 374.84 g/mol. This white crystalline solid serves as a crucial reagent in chemical synthesis, particularly as a phase transfer catalyst. Its distinct properties make it valuable in facilitating reactions between immiscible phases, contributing to efficient organic transformations and analytical procedures.

Phase Transfer Catalysis
Tetraphenylphosphonium chloride acts as an effective phase transfer catalyst, enabling reactions between reactants located in different immiscible phases (e.g., aqueous and organic). This facilitates nucleophilic substitution reactions and other transformations that would otherwise be slow or require harsh conditions.
Chemical Synthesis Reagent
It is employed as a versatile reagent in various organic synthesis pathways. Its ability to transfer anions across phase boundaries makes it useful for introducing specific functional groups or preparing complex organic molecules.
Analytical Chemistry
This compound is utilised in analytical procedures, notably for the spectrophotometric determination of certain metal ions such as bismuth and cobalt, owing to its ability to form stable complexes.
| Molecular weight | 374.84 |
|---|---|
| Linear formula | (C6H5)4P(Cl) |
| Assay | 98% |
| Melting point | 272-274 °C(lit.) |

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 | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Quality | for the spectrophotometric det. of Bi, Co |
|---|
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 Tetraphenylphosphonium chloride used for?
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Tetraphenylphosphonium chloride is primarily used as a phase transfer catalyst in chemical synthesis and for the spectrophotometric determination of bismuth and cobalt.
What is the CAS number and formula for Tetraphenylphosphonium chloride?
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The CAS number for Tetraphenylphosphonium chloride is 2001-45-8, and its linear formula is (C6H5)4P(Cl).
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Tetraphenylphosphonium chloride with an assay of 98%. We do not represent this product as USP, BP, or EP grade.
How should Tetraphenylphosphonium chloride be handled?
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Handle Tetraphenylphosphonium chloride with appropriate personal protective equipment, including a dust mask (type N95 recommended), eyeshields, and gloves. Avoid breathing dust and ensure adequate ventilation. It is classified as a Warning with hazards including skin irritation (H315), eye irritation (H319), and respiratory irritation (H335).
How is Tetraphenylphosphonium chloride packed and shipped?
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Tetraphenylphosphonium chloride is carefully packed according to industry standards for safe transport and is available for export globally by Tech Serve Solutions.
How can I request a sample or quote for Tetraphenylphosphonium chloride?
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To request a sample or a quote for Tetraphenylphosphonium chloride, please contact our sales team via the website or provide your details through the enquiry form.
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