2-(Triphenylphosphonio)ethyl chloroformate chloride
2-(Triphenylphosphonio)ethyl chloroformate chloride (CAS 61083-59-8) is a specialised organic compound with the linear formula (C6H5)3P(Cl)CH2CH2OCOCl and a molecular weight of 405.25 g/mol. This phosphonium salt derivative is primarily utilised as a versatile building block in complex organic synthesis, particularly within the pharmaceutical and fine chemical industries. Its reactive chloroformate and phosphonium functionalities allow for diverse chemical transformations.
- IUPAC
- ‘Kunz′-Reagent,Chloroformic acid 2-(triphenylphosphonio)ethyl ester chloride,PEOC-Cl
- Synonyms
- Chloroformic acid 2-(triphenylphosphonio)ethyl ester chloridePEOC-Cl

Organic Synthesis Reagent
Serves as a key intermediate and reagent in multi-step organic syntheses, enabling the introduction of specific functional groups.
Pharmaceutical Intermediate
A valuable building block in the development of novel pharmaceutical compounds and active pharmaceutical ingredients (APIs).
Fine Chemical Production
Employed in the synthesis of complex fine chemicals requiring precise molecular construction and functionalisation.
| Molecular weight | 405.25 |
|---|---|
| Linear formula | (C6H5)3P(Cl)CH2CH2OCOCl |
| Assay | ≥98.0% (T) |
| Grade | purum |
| Storage temperature | −20°C |
| Melting point | ~130 °C (dec.) |


Hazard statements
- H314Causes severe skin burns and eye damage
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3261 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34-36/37 |
| 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 2-(Triphenylphosphonio)ethyl chloroformate chloride used for?
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This compound is primarily used as a building block and reagent in organic synthesis, particularly for creating pharmaceutical intermediates and fine chemicals.
What is the CAS number and formula for 2-(Triphenylphosphonio)ethyl chloroformate chloride?
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The CAS number is 61083-59-8 and the linear formula is (C6H5)3P(Cl)CH2CH2OCOCl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this product at a 'purum' grade with an assay of ≥98.0% (T). We do not represent it as USP, BP, or EP grade.
How should 2-(Triphenylphosphonio)ethyl chloroformate chloride be handled safely?
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This compound is a Danger hazard, causing severe skin burns and eye damage and may cause respiratory irritation (H314, H335). Handle with appropriate personal protective equipment including eyeshields, gloves, and respiratory protection in a well-ventilated area. Refer to the Safety Data Sheet for full guidance.
Is this product available for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, pharmaceutical intermediates, and laboratory reagents.
How can I request a sample or quote?
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Please contact our sales team directly via the website or phone to request a sample or a detailed quotation.
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