Other grades of this product :
| Polymethylene polyphenyl polyisocyanate Basic information |
| Polymethylene polyphenyl polyisocyanate Chemical Properties |
| Boiling point | 392 °C5 mm Hg | | density | 1.2 g/mL at 25 °C(lit.) | | vapor density | 8.6 (vs air) | | refractive index | n20/D 1.634 | | Fp | >230 °F | | storage temp. | Refrigerator, Under inert atmosphere | | solubility | DMSO (Sparingly), Ethyl Acetate (Slightly), Methanol (Soluble) | | form | Oil | | color | Yellow to Orange | | Stability: | Stable. Incompatible with strong oxidizing agents, alcohols. May decompose in moist air, or on contact with water. | | IARC | 3 (Vol. 19, Sup 7) 1987 | | EPA Substance Registry System | Polymeric diphenylmethane diisocyanate (9016-87-9) |
| Polymethylene polyphenyl polyisocyanate Usage And Synthesis |
| 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. |
| Polymethylene polyphenyl polyisocyanate Preparation Products And Raw materials |
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