Product

Main Product

Product

4,4'-Methylene Diphenyl Diisocyanate

Abbreviation

4,4'-MDI

Names

1,1′-Methylenebis(4-Isocyanatobenzene); Bis(4-Isocyanatophenyl)Methane; 1-Isocyanato-4-[(4-Isocyanatophenyl)Methyl]Benzene; 4,4′-Methylene Diphenyl Diisocyanate; 4,4′-Diphenylmethane Diisocyanate; Methylene bis(4-Pheny Isocyanate); Pure MDI

Production

Global Production Production Map

Methylene Diphenyl Diisocyanate (MDI) is an aromatic Diisocyanate. The 4,4′ isomer is most widely used. This isomer is also known as Pure MDI. MDI reacts with polyols in the manufacture of Polyurethane.

CAS Number

101-68-8

EC Number

202-966-0

ECHA InfoCard

100.002.697

IUPAC Name

1,1'-Methylenebis(4-Isocyanatobenzene)

PubChem ID

7570

Chemical Formula

C₁₅H₁₀N₂O₂

Molecular Weight (g/mol)

250.25

Boiling Point (°C)

314

Melting Point (°C)

41

Sulfur Content (wt%)

0

Specific Gravity

1.23

Default

Status

A

Update by

 Kokel, Nicolas

Updated

8/9/2025 8:43 AM

Added by

 Kokel, Nicolas

Added

4/8/2021 9:28 AM