Tetramethylphosphonium chloride
Tetramethylphosphonium chloride (CAS: 1941-19-1, (CH₃)₄PCl) is a phosphonium salt with a molecular weight of 128.58 g/mol. It is supplied by Tech Serve Solutions at a minimum assay of 98%. This compound is a versatile reagent primarily utilised in chemical synthesis and as a phase transfer catalyst, facilitating reactions between immiscible phases. Its applications span various synthetic organic chemistry processes, making it a valuable tool for researchers and industrial chemists.

Phase Transfer Catalysis
Tetramethylphosphonium chloride acts as an effective phase transfer catalyst, enabling reactions between reactants located in different immiscible phases (e.g., aqueous and organic). This enhances reaction rates and allows for milder reaction conditions.
Chemical Synthesis
It serves as a key building block or reagent in various organic synthesis pathways. Its phosphonium nature allows it to participate in diverse chemical transformations, contributing to the creation of complex molecules.
Reagent in Organic Chemistry
As a synthetic reagent, it can be employed in specific reactions requiring a source of the tetramethylphosphonium cation or for its particular reactivity profile in academic and industrial research laboratories.
| Molecular weight | 128.58 |
|---|---|
| Linear formula | (CH3)4PCl |
| Assay | 98% |

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) | 26-37/39 |
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 Tetramethylphosphonium chloride used for?
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Tetramethylphosphonium chloride is primarily used as a phase transfer catalyst and as a reagent in general chemical synthesis.
What is the CAS number and formula for Tetramethylphosphonium chloride?
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The CAS number for Tetramethylphosphonium chloride is 1941-19-1, and its linear formula is (CH₃)₄PCl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Tetramethylphosphonium chloride with a minimum assay of 98%. We do not represent this product as USP, BP, or EP grade.
How should Tetramethylphosphonium chloride be handled safely?
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Tetramethylphosphonium chloride is classified as a Warning substance. It can cause skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves, should be used. Ensure good ventilation and avoid dust formation. If in eyes, rinse cautiously with water for several minutes (P305 + P351 + P338).
Is Tetramethylphosphonium chloride a controlled substance?
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Based on the provided data, Tetramethylphosphonium chloride is not indicated as a controlled substance.
How is Tetramethylphosphonium chloride packed and shipped?
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Tech Serve Solutions exports fine chemicals globally. Specific packaging details for export will be confirmed upon order placement, adhering to international shipping regulations.
How can I request a quote or sample for Tetramethylphosphonium chloride?
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To request a quote or sample of Tetramethylphosphonium chloride, please contact our sales department through the website or via direct inquiry, providing your contact details and the quantity required.
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