2,4-TDI dimer Isocyanate


2,4-Toluenediisocyanate dimer CAS # 26747-90-0

Molecular weight 348
Isocyanate, %
Equivalent weight 174
Toxicity See MSDS of the supplier
Chemical Composition: Dimeric 2.4-toluene diisocyanate


Appearance: Fine, white powder
Molecular weight: 348
Specific gravity, g/cm3 Approximately 1.48 
Storage Stability: 12 months under dry and cool conditions
Melting Point, C (F) >145  (>293)

Regulatory Inventory
CAS REGISTRY NUMBER # 26747-90-0 NAME :  1,3-Diazetidine-2,4-dione, 1,3-bis(3-isocyanatomethylphenyl)
DSL Canada Yes
EINECS Europe EINECS No. 247-953-0 Yes
ECL Korea ECL Serial No. KE-03246 Yes
ENCS Japan   No
AICS Australia Yes
Swiss Switzerland SWISS No. G-3609 Yes
The fact that a compound is not listed under a specific CAS # in a countries inventory does not mean this compound cannot be used, it can be an exempt compound or polymer which does not require listing, or it can be listed in a different category. Ask your supplier.
Other names: 
1.3 Bis (3-isocyanato-4- methylphenyl) -1.3-diazetidin-2.4-dione, 1,3-Bis(3-isocyanatomethylphenyl)urete-2,4-dione
2,4-TDI dimer, 2,4-Toluenediisocyanate dimer
2,4-Tolylene diisocyanate cyclic dimer
2,4-Tolylene diisocyanate dimer
Isocyanic acid, (2,4-dioxo-1,3-uretidinediyl)bis(methyl-m-phenylene) ester, m-Tolylene diisocyanate dimer
Commercial Products or generic terms used for products. For manufacturer see Isocyanate MFCT.
Commercial products are mixtures of isomers with 2,4-toluenediisocyanate
Thanecure T9 Desmodur TT

Some of these product names might not be commercial anymore, the product names still might be in old formulations

Last edited on:

July 06, 2006

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