Jump to: navigation, s Methylene diphenyl diisocyanate, most often abbreviated as MDI, is an aromatic diisocyanate. It exists in three isomers, 2,2'-MDI, 2,4'-MDI, and 4,4'-MDI. The 4,4' isomer is most practically useful, and is also known as Pure MDI. MDI is reacted with a polyol in the manufacture of polyurethane. It is the most produced diisocyanate, accounting for 61.3% of the global market in the year 2000.[1] earch
{| ! style="background: rgb(248, 234, 186) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial" colspan="2" | 4,4'-methylene diphenyl diisocyanate |} IUPAC name 1-isocyanato-4-
[(4-isocyanatophenyl)methyl]
benzene Other names Pure MDI
4,4'-methylene diphenyl
diisocyanate
4,4'-diphenylmethane
diisocyanate {| ! style="background: rgb(248, 234, 186) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial" colspan="2" | Identifiers |} CAS number 101-68-8 RTECS number NQ9350000 SMILES O=C=NC(C=C2)=CC=C2C
C1=CC=C(N=C=O)C=C1 {| ! style="background: rgb(248, 234, 186) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial" colspan="2" | Properties |} Molecular formula C15H10N2O2 Molar mass 250.25 g/mol Appearance white or pale yellow solid Density 1.230 g/cm3, solid Melting point 40 °C (313 K) Boiling point 314 °C (587 K) Solubility in water Reacts {| ! style="background: rgb(248, 234, 186) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial" colspan="2" | Hazards |} EU classification Harmful (Xn) R-phrases R20, R36/37/38, R42/43 S-phrases (S1/2), S23, S36/37, S45 Flash point 212-214 °C (Cleveland open cup) {| ! style="background: rgb(248, 234, 186) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial" colspan="2" | Related Compounds |} Related Isocyanates Toluene diisocyanate
Naphthalene diisocyanate Related compounds Polyurethane Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references Methylene diphenyl diisocyanate, most often abbreviated as MDI, is an aromatic diisocyanate. It exists in three isomers, 2,2'-MDI, 2,4'-MDI, and 4,4'-MDI. The 4,4' isomer is most practically useful, and is also known as Pure MDI. MDI is reacted with a polyol in the manufacture of polyurethane. It is the most produced diisocyanate, accounting for 61.3% of the global market in the year 2000.[1]
Diphenylmethane-4,4'-diisocyanate (MDI) is an organic compound that belongs to the isocyanate family, characterized by the presence of two isocyanate functional groups attached to a diphenylmethane structure. It is primarily used in the production of polyurethanes, which are versatile materials employed in various applications such as foams, coatings, adhesives, and elastomers. MDI is known for its excellent mechanical properties and durability, making it valuable in industries like construction, automotive, and furniture manufacturing. However, it is also a hazardous substance that requires careful handling due to its potential health risks.
Diphenylmethane is a liquid over 22 oC.
Diphenylmethane is a liquid over 22 oC.
Methylene diphenyl diisocyanate, often abbreviated as MDI, is known as an aromatic diisocyanate.
Naphthalene has higher resonance energy compared to diphenylmethane, as naphthalene has a more extensive delocalization of electrons due to its two benzene rings being fused together. Diphenylmethane, on the other hand, has less delocalization due to the presence of a saturated carbon in the molecule.
Yes
The Harmonized System (HS) code for toluene diisocyanate is 2929.10.00.
yes u can
Diphenylmethane is a chemical compound consisting of two phenyl groups attached to a methane backbone. It is used as an intermediate in the production of various organic compounds and polymers. Diphenylmethane can also act as a heat transfer fluid at high temperatures.
Howard E. Momberg has written: 'A comparison of two methods for the determination of toluene diisocyanate in air' -- subject(s): Toluene 2,4-Diisocyanate, Analysis
If you think to diphenylmethane this compound is a solid under 25 oC.
It is pronounced as "dye-uh-so-sigh-uhn-ate."