4,4′-Methylenebis(phenyl isocyanate)
4,4′-Methylenebis(phenyl isocyanate) (CAS: 101-68-8) is a key isocyanate monomer with the linear formula CH2(C6H4NCO)2 and a molecular weight of 250.25 g/mol. It is primarily utilised in the formulation of UV curable and latent catalyst-containing polymerisation compositions. Its reactivity makes it valuable in chemical synthesis and materials science for creating advanced polymers and crosslinked networks.
- IUPAC
- 4,4′-MDI,Bis(4-isocyanatophenyl)methane
- Synonyms
- 4,4′-MDIBis(4-isocyanatophenyl)methane
Polymerisation Compositions
Serves as a crucial component in UV curable systems, enabling rapid polymerisation upon exposure to ultraviolet light. It is also formulated into latent catalyst-containing compositions for controlled polymerisation processes.
Crosslinking Agent
Its difunctional isocyanate nature allows it to act as an effective crosslinking agent, enhancing the mechanical properties and thermal stability of polymer networks. This is vital in materials science applications.
Chemical Synthesis Intermediate
Utilised in chemical synthesis pathways for the creation of complex organic molecules and advanced polymer precursors. Its specific reactivity is leveraged for targeted synthetic transformations.
| Molecular weight | 250.25 |
|---|---|
| Linear formula | CH2(C6H4NCO)2 |
| Assay | 98% |
| Boiling point | 200 °C/5 mmHg(lit.) |
| Density | 1.18 g/mL at 25 °C(lit.) |
| Storage temperature | −20°C |
| Application | Uses include UV curable and latent catalyst-containing polymerization compositions.1 |
| Melting point | 42-45 °C(lit.) |
Hazard statements
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- H319Causes serious eye irritation
- H332Harmful if inhaled
- H334May cause allergy or asthma symptoms if inhaled
- H335May cause respiratory irritation
- H351Suspected of causing cancer
- H373May cause damage to organs through prolonged exposure
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P342
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Transport (UN / ADR) | UN 3335 |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 20-36/37/38-40-42/43-48/20 |
| Safety statements (S) | 23-36/37-45 |
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 4,4′-Methylenebis(phenyl isocyanate) used for?
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4,4′-Methylenebis(phenyl isocyanate) (CAS 101-68-8) is used in UV curable and latent catalyst-containing polymerisation compositions, and as a crosslinking agent and intermediate in chemical synthesis and materials science.
What is the CAS number and formula for 4,4′-Methylenebis(phenyl isocyanate)?
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The CAS number is 101-68-8 and the linear formula is CH2(C6H4NCO)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4,4′-Methylenebis(phenyl isocyanate) with an assay of 98%. This is a technical/research grade product, and TSS does not represent it as USP, BP, or EP grade.
How should 4,4′-Methylenebis(phenyl isocyanate) be handled safely?
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Handling requires appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, faceshields, and gloves, due to its classification as a Danger hazard (H315-H317-H319-H332-H334-H335-H351-H373). Ensure adequate ventilation and follow precautionary statements (P261-P280-P305 + P351 + P338-P342 + P311).
How is 4,4′-Methylenebis(phenyl isocyanate) packed, shipped, and exported?
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4,4′-Methylenebis(phenyl isocyanate) is available for packing, shipping, and export. Specific packaging details and shipping regulations will be provided upon inquiry, adhering to UN 3335 classification for transport.
How can I request a quote or sample?
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To request a quote or sample of 4,4′-Methylenebis(phenyl isocyanate), please contact our sales team through the provided channels on the Tech Serve Solutions website.
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