256439
4,4′-Methylenebis(phenyl isocyanate)
98%
Synonym(s):
4,4′-MDI, Bis(4-isocyanatophenyl)methane
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About This Item
Linear Formula:
CH2(C6H4NCO)2
CAS Number:
Molecular Weight:
250.25
Beilstein:
797662
EC Number:
MDL number:
UNSPSC Code:
12162002
PubChem Substance ID:
NACRES:
NA.23
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Quality Level
Assay
98%
form
solid
reaction suitability
reagent type: cross-linking reagent
bp
200 °C/5 mmHg (lit.)
mp
42-45 °C (lit.)
density
1.18 g/mL at 25 °C (lit.)
storage temp.
−20°C
SMILES string
O=C=Nc1ccc(Cc2ccc(cc2)N=C=O)cc1
InChI
1S/C15H10N2O2/c18-10-16-14-5-1-12(2-6-14)9-13-3-7-15(8-4-13)17-11-19/h1-8H,9H2
InChI key
UPMLOUAZCHDJJD-UHFFFAOYSA-N
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General description
4,4′-Methylenebis(phenyl isocyanate) (MDI) is an aromatic diisocyanates class of monomer that is widely used in the production of polyurethane plastics, foam insulation, coatings, adhesives, and sealants. It is highly reactive due to the presence of two isocyanate functional groups. MDI is known for its excellent strength, durability, and resistance to chemical and environmental damage, which makes it useful in resin composition, lithographic printing plates, coating films, optical films, image display devices, semiconductor devices, and polyurethane foam production.
Application
4,4′-Methylenebis(phenyl isocyanate) can be used as a starting material to synthesize:
- Polyurethane cationomers, that are applicable in medical implants.
- A prepolymer for preparing self-healable polyurethane elastomers.
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Acute Tox. 4 Inhalation - Carc. 2 - Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT RE 2 Inhalation - STOT SE 3
Target Organs
Respiratory system
Storage Class Code
11 - Combustible Solids
WGK
WGK 1
Flash Point(F)
411.8 °F - closed cup
Flash Point(C)
211 °C - closed cup
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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A 43-year-old woman was referred by her occupational health service with suspected occupational contact dermatitis. In connection with the investigation, a workplace visit was undertaken at her company, which used an adhesive based on pre-polymeric diphenylmethane diisocyanate in one of
A comparison of two sampling methods for the detection of airborne methylene bisphenyl diisocyanate.
Joshua W Schaeffer et al.
Journal of occupational and environmental hygiene, 10(4), 213-221 (2013-02-28)
The purpose of this study was to determine if there was a significant difference between two readily available sampling methodologies for airborne methylene bisphenyl diisocyanate (MDI), which is an essential precursor in the spray-on truck bed lining industry. Seventy-two personal
Adam V Wisnewski et al.
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Methylene diphenyl diisocyanate (MDI), a low molecular weight chemical important for producing polyurethane foam, coatings, and elastomers is a major cause of occupational asthma, however, mechanisms of disease pathogenesis remain poorly understood. This study characterizes the rearranged germline and hypervariable
Hanna K Lindberg et al.
Mutation research, 723(1), 1-10 (2011-04-02)
Toluene diisocyanate (TDI) and 4,4'-methylenediphenyl diisocyanate (MDI), used in the production of polyurethane foam, are well known for their irritating and sensitizing properties. Contradictory results have been obtained on their genotoxicity. We investigated the genotoxicity and protein binding of inhaled
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