| Chemical Properties | liquid |
| Uses | Poly[methylene(polyp?henyl Isocyanate)?] is an engineering polymer used in the synthesis of highly resiliant polyurethane foams with flame retardancy.Environmental toxin on US EPA Toxic Release Inventory list (TRI) list. |
| Definition | A polymer of diphenylmethane-4,4′-diisocyanate.
|
| General Description | Dark-brown liquid with a weak odor. Sinks in water. |
| Air & Water Reactions | Reacts with water slowly forming heavy scum and liberating carbon dioxide gas. Dangerous pressure can build up if container is sealed. |
| Reactivity Profile | Polymethylene polyphenyl polyisocyanate reacts with water slowly forming heavy scum and liberating carbon dioxide gas. Dangerous pressure can build up if container is sealed. 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]. |
| Hazard | Questionable carcinogen. |
| Health Hazard | Inhalation causes breathlessness, chest discomfort, and reduced pulmonary function; wheezing, cough, and sputum may also occur. Contact with liquid irritates eyes and skin. Ingestion causes irritation of mouth and stomach. |
| Fire Hazard | Behavior in Fire: Containers may explode. |
| Safety Profile | Moderately toxic by
ingestion. Mildly toxic by inhalation.
Questionable carcinogen with experimental
neoplastigenic data by implant route. When
heated to decomposition it emits toxic
fumes of NOx. |
