4,4-MDI Isocyanate


4,4'-Diisocyanatodiphenylmethane CAS # 101-68-8

Molecular weight 250.25
Isocyanate, % 32
Equivalent weight 125
Toxicity Analysis method    OSHA air sampling method, See supplier for MSDS
International Chemical Safety Card

Crystalline Solid Liquid at 42C
Appearance Colorless solid Colorless liquid
Specific gravity @ 25C 1.2 1.19
Flash point, C (PMCC,C DJZ) 202 202
Viscosity, mPas -- 4.1
Bulk Density, lb/gal 10 9.93
Freezing Temperature, C 39 39
Recommended Storage Temperature 5C  (41F) max** 41-44C (107-111F)
Storage Time at Recommended Temperature (max) 3 months 3 weeks
Bayer Datasheet 

Regulatory Inventory
CAS REGISTRY NUMBER # 101-68-8 NAME : Benzene, 1,1'-methylenebis[4-isocyanato
DSL Canada Yes
EINECS Europe EINECS No. 202-966-0 Yes
ECL Korea ECL Serial No. KE-12080 Yes
ENCS Japan ENCS No. 4-118X Yes
AICS Australia 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: 
4,4'-methylenediphenyl diisocyanate 
Benzene, 1,1'-methylenebis[4-isocyanato
Diphenyl methane diisocyanate 
Diphenylmethane 4,4'-diisocyanate 
Commercial Products or generic terms used for products. For manufacturer see Isocyanate MFCT.
Mondur M RUBINATE 44
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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