Products Description
Toluene 2,6-Diisocyanate (CAS No. 91-08-7) is an aromatic organic compound classified as an isocyanate. It has a molecular formula of C₉H₆N₂O₂ and a molecular weight of 174.16 g/mol. Under ambient conditions, it is typically present as a colorless to light-yellow transparent liquid. The product has a density of 1.225 g/mL at 25°C, a boiling point of 129–133°C at 18 mmHg, and a flash point above 230°F (approximately 127°C). Its vapor pressure is approximately 2 Pa at 20°C.
Toluene 2,6-diisocyanate is compatible with organic solvents such as benzene and acetone. Due to its high chemical reactivity, it reacts vigorously with water and can undergo rapid polymerization in the presence of alkaline substances. The material is also flammable and should be kept away from strong oxidizing agents.
Toluene 2,6-diisocyanate is primarily utilized as a reactive monomer in the manufacture of polyurethane flexible foams, coatings, elastomers, and other polyurethane-based materials. Its aromatic isocyanate functionality provides the reactivity required for polyurethane polymerization and related material-processing applications.
Chemical Properties
| English Name | 2-METHYL-M-PHENYLENE DIISOCYANATE |
| English Synonyms | 1,3-diisocyanato-2-methyl-benzen;1,3-Diisocyanato-2-methylbenzene;2,6-diisocyanato-1-methyl-benzen; 2,6-Diisocyanato-1-methylbenzene;2,6-Toluenediiosocyanate;Isocyanic acid, 2-methyl-m-phenylene ester;i socyanicacid,2-methyl-meta-phenyleneester;isocyanicacid,2-methyl-m-phenyleneester |
| CAS Number | 1991/8/7 |
| Molecular Formula | C9H6N202 |
| Molecular Weight | 174.16 |
| EINECS Number | 202-039-0 |
| Melting point | 13℃ |
| Boiling point | 129-133 °C18 mm Hg(lit.) |
| Density | 1.225 g/mL at 25 °C(lit.) |
| Vapor pressure | 2.78Pa at 25℃ |
| Refractive index | n20/D 1.571(lit.) |
| Flash point | >230 °F |
| Storage conditions | -20℃ |
| Form | Liquid |
| Color | Transparent and colorless to pale yellow |
| Water solubility | It hydrolyzes in water. |
| Sensitivity | Moisture Sensitive |
| BRN | 2211546 |
| Exposure limit | ACGIH TLV-TWA:0.001 ppm (0.007 mg/m3),Inhalable fraction and vapor;TLV-STEL:0.005 ppm (0.035 mg/m 3),Inhalable fraction and vapor |
| Stability | Reacts violently with water. Reacts very rapidly with compounds containing active hydrogen (such as amines, alcohols, and acids). Polymerizes rapidly in the presence of a base. Flammable. Incompatible with strong oxidizing agents. |
| InChI | 1S/C9H6N2O2/c1-7-8(10-5-12)3-2-4-9(7)11-6-13/h2-4H,1H3 |
| InChIKey | RUELTTOHQODFPA-UHFFFAOYSA-N |
| SMILES | Cc1c(cccc1N=C=O)N=C=O |
| LogP | 3.74 |
Product Application
Uses: Toluene 2,6-diisocyanate serves as an important building block for polyurethane foams used in bedding, furniture, and automotive seating. It is also used in the production of sealants and adhesives.
