4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE

CAS NO.：139-25-3
Empirical Formula: C17H14N2O2
Molecular Weight: 278.31
MDL number: MFCD00019910
SAFETY DATA SHEET (SDS)
Update Date: 2024-07-18 18:48:51

What is 4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE?

The Uses of 4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE

4,?4''-?Diisocyanato-?3,?3''-?dimethyldiphenylmeth?ane is a reagent used in the synthesis of polyurethane materials.Environmental toxin on US EPA Toxic Release Inventory list (TRI) list.

Reactivity Profile

Isocyanates and thioisocyanates, such as 4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE, are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence, [Wischmeyer(1969)].

Safety Profile

Poison by intravenous route. A sensitizer. When heated to decomposition it emits toxic fumes of NOx and CN-.

Properties of 4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE

Boiling point:	421.12°C (rough estimate)
Density	1.1222 (rough estimate)
refractive index	1.5500 (estimate)
CAS DataBase Reference	139-25-3
EPA Substance Registry System	3,3'-Dimethyldiphenylmethane-4,4'-diisocyanate (139-25-3)