Polymethylene polyphenyl polyisocyanate CAS#9016-87-9
Important Industrial Raw Material — PAPI, also known as crude MDI, is an important chemical raw material for various industrial applications.
High Functionality — With an average functionality greater than 2, it offers excellent reactivity for polymer and polyurethane production.
MDI-Polyisocyanate Composition — Composed of approximately 50% MDI and 50% polyisocyanate, providing versatile chemical performance.
Stable Physical Properties — Features a viscous liquid form, a density of approximately 1.1–1.2 g/cm³ at 20–25°C, and a relatively high boiling point.
Polymethylene polyphenyl polyisocyanate CAS#9016-87-9
Polyphenyl polymethylene polyisocyanate, also known as PAPI or crude MDI, is an important chemical raw material. It typically appears as a light yellow to dark brown viscous liquid or a brown transparent liquid with a pungent odor.
It is a mixture consisting of approximately 50% MDI and 50% polyisocyanate, with an average functionality greater than 2. Its density is approximately 1.1–1.2 g/cm³ at 20–25°C, and its boiling point is about 373.4°C at 760 mmHg or 392°C at 5 mmHg.
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. |
| InChI | InChI=1S/C7H5NO.CH2O/c9-6-8-7-4-2-1-3-5-7;1-2/h1-5H;1H2 |
| InChIKey | JTEOXXUIKUHXLD-UHFFFAOYSA-N |
| SMILES | O=C=NC1C([H])=C([H])C([H])=C([H])C=1[H].O=C([H])[H] |
| IARC | 3 (Vol. 19, Sup 7) 1987 |
| EPA Substance Registry System | Polymeric diphenylmethane diisocyanate (9016-87-9) |
| Hazard Codes | Xn,T+,T,F |
| Risk Statements | 20-36/37/38-42-42/43-26-22-39/23/24/25-23/24/25-11-20/21/22 |
| Safety Statements | 26-28-38-45-36/37-23-16-7-36 |
| WGK Germany | 3 |
| RTECS | TR0350000 |
| Hazardous Substances Data | 9016-87-9(Hazardous Substances Data) |
Product Application of Polymethylene Polyphenyl Polyisocyanate CAS#9016-87-9
Polymethylene polyphenyl polyisocyanate is used in the production of polyurethane materials. It is widely used in the construction, automotive, and electrical industries, where it serves as an insulation material and is also used in products such as mattresses.
