P,P-Dichlorophenylphosphine
P,P-Dichlorophenylphosphine (CAS: 644-97-3) is an organophosphorus compound with the linear formula C6H5PCl2 and a molecular weight of 178.98 g/mol. This compound serves as a crucial intermediate in chemical synthesis, particularly in the preparation of phosphine derivatives and in catalysis. Its reactive nature makes it valuable for introducing phosphorus into organic molecules. Tech Serve Solutions supplies this chemical with an assay of 97%.
- IUPAC
- PhPCl2,Phenyldichlorophosphine,Phenylphosphine dichloride,Phenylphosphonous dichloride
- Synonyms
- C6H5PCl2PhenyldichlorophosphinePhenylphosphine dichloridePhenylphosphonous dichloride

Chemical Synthesis Intermediate
P,P-Dichlorophenylphosphine is widely employed as a building block in organic synthesis. It is instrumental in the formation of various organophosphorus compounds, including phosphines and phosphonates.
Catalysis
This compound is utilised in the field of catalysis, often serving as a precursor for ligands in transition metal-catalysed reactions. Its phosphorus centre can coordinate with metal ions, influencing catalytic activity and selectivity.
Phosphorus Precursor
As a readily available source of dichlorophosphine, it is valuable for synthesising more complex phosphorus-containing molecules. Its reactivity allows for controlled functionalization in multi-step synthetic routes.
| Molecular weight | 178.98 |
|---|---|
| Linear formula | C6H5PCl2 |
| Assay | 97% |
| Boiling point | 222 °C/759 mmHg(lit.) |
| Density | 1.319 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.597(lit.) |
| Melting point | −51 °C(lit.) |



Hazard statements
- H250Catches fire spontaneously if exposed to air
- H301Toxic if swallowed
- H314Causes severe skin burns and eye damage
Precautionary statements
- P222Do not allow contact with air
- P231Handle under inert gas
- P280Wear protective gloves, clothing and eye/face protection
- P301IF SWALLOWED
- P305IF IN EYES
- P422
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Transport (UN / ADR) | UN 2845 4.2 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F,T |
| Risk statements (R) | 17-25-34 |
| Safety statements (S) | 26-28-36/37/39-43-45 |
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 P,P-Dichlorophenylphosphine used for?
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P,P-Dichlorophenylphosphine (CAS: 644-97-3) is primarily used as an intermediate in chemical synthesis, particularly for creating phosphine compounds and in catalytic applications. It acts as a precursor for introducing phosphorus into various organic structures.
What are the CAS number and formula for P,P-Dichlorophenylphosphine?
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The CAS number for P,P-Dichlorophenylphosphine is 644-97-3, and its linear formula is C6H5PCl2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies P,P-Dichlorophenylphosphine with an assay of 97%. This product is not represented as USP, BP, EP, or other pharmacopoeia grades. It is supplied for research and development purposes.
How should P,P-Dichlorophenylphosphine be handled safely?
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P,P-Dichlorophenylphosphine is highly reactive and pyrophoric (H250), corrosive (H314), and toxic if swallowed (H301). Handling requires extreme caution, including the use of full-face respirators, chemically resistant gloves, and eye protection in a well-ventilated area or fume hood. Refer to the Safety Data Sheet for comprehensive handling and emergency procedures.
Is P,P-Dichlorophenylphosphine a controlled substance?
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The provided data does not indicate that P,P-Dichlorophenylphosphine (CAS: 644-97-3) is a controlled substance. Please consult relevant local regulations for specific import/export compliance.
How is P,P-Dichlorophenylphosphine shipped and exported?
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P,P-Dichlorophenylphosphine is classified under UN 2845, hazard class 4.2, and is shipped as a pyrophoric solid. TSS exports this chemical in compliance with all international shipping and dangerous goods regulations.
How can I request a quote or sample for P,P-Dichlorophenylphosphine?
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To request a quote or a sample of P,P-Dichlorophenylphosphine (CAS: 644-97-3), please use the 'Request a Quote' or 'Sample Request' functionality on our website, or contact our sales team directly.
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