Bis(dichlorophosphino)methane
Bis(dichlorophosphino)methane (CAS 28240-68-8; formula Cl2PCH2PCl2; molar mass 217.79 g/mol) is a reactive organophosphorus reagent in which two dichlorophosphino groups are bridged by a single methylene unit. Supplied as a moisture-sensitive liquid (assay 95%), it is a versatile building block for synthesising bidentate diphosphine ligands and other phosphorus compounds used in catalysis and chemical synthesis. Tech Serve Solutions supplies it to research and industrial users worldwide.
- IUPAC
- Methylenebis(dichlorophosphine),Methylenebis(phosphonous dichloride)
- Synonyms
- Bis(dichlorophosphino)methaneMethylenebis(dichlorophosphine)Methylenebis(phosphonous dichloride)Methylenediphosphonous dichlorideCl2PCH2PCl2CAS 28240-68-8
Bidentate diphosphine ligand synthesis
The two reactive P-Cl centres are readily derivatised to build methylene-bridged bidentate diphosphine ligands. These chelating ligands are widely used to stabilise transition-metal complexes for homogeneous catalysis.
Organophosphorus building block
It serves as a precursor for a range of phosphorus(III) compounds via substitution of its chlorine atoms with carbon, oxygen, nitrogen or other nucleophiles. This makes it a useful intermediate in chemical synthesis.
Catalysis and inorganic chemistry research
As a polydentate phosphine ligand precursor, it supports the preparation of metal complexes studied in coordination chemistry and homogeneous catalysis. It is typically employed at laboratory and pilot scale.
Phosphine compound preparation
The methylene backbone provides a short, rigid spacer between the two phosphorus centres, a feature exploited when preparing specialised phosphine compounds and ligand frameworks for further functionalisation.
| Molecular weight | 217.79 |
|---|---|
| Linear formula | Cl2PCH2PCl2 |
| Assay | 95% |
| Density | 1.601 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.5940(lit.) |
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 |
|---|---|
| Flash point | 96 °C / 204.8 °F |
| Transport (UN / ADR) | UN 3265 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 14-34 |
| Safety statements (S) | 26-36/37/39-43-45 |
| Supplemental hazards | Reacts violently with water. |
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 Bis(dichlorophosphino)methane used for?
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It is used mainly as a reactive organophosphorus building block for synthesising methylene-bridged bidentate diphosphine ligands and other phosphorus(III) compounds. These find application in coordination chemistry, homogeneous catalysis and general chemical synthesis.
What is the CAS number and molecular formula of Bis(dichlorophosphino)methane?
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The CAS number is 28240-68-8 and the molecular formula is Cl2PCH2PCl2 (linear formula Cl2P-CH2-PCl2). Its molecular weight is 217.79 g/mol and the MDL number is MFCD01073767.
What grade and purity does Tech Serve Solutions supply?
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It is supplied as a research/technical-grade reagent with a typical assay of 95%. We do not represent it as USP, BP or EP pharmacopoeia grade. A Certificate of Analysis can be provided with each consignment on request.
What are the safety and handling requirements for Bis(dichlorophosphino)methane?
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It is classified GHS05, signal word Danger, hazard statement H314 (causes severe skin burns and eye damage), and reacts violently with water. Handle under dry, inert conditions with goggles, face shield, gloves and suitable respiratory protection (precautionary statements P280, P305+P351+P338, P310). Always consult the SDS before use.
How is Bis(dichlorophosphino)methane packed, shipped and exported?
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It is packed in tightly sealed, moisture-excluding containers appropriate to the order quantity and shipped as a Class 8 corrosive (UN 3265, packing group II) in compliance with applicable dangerous-goods regulations. We export worldwide with full documentation, including SDS and Certificate of Analysis.
How do I request a sample or quote?
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Contact Tech Serve Solutions with your required quantity, grade and delivery destination, and our team will respond with availability, lead time and a formal quotation. Sample requests for evaluation can be accommodated subject to dangerous-goods shipping requirements.
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