Product Description
Toluene-2,6-diisocyanate (2,6-TDI) is an aromatic organic compound belonging to the isocyanate family. Its molecular formula is C₉H₆N₂O₂, and its molecular weight is 174.16 g/mol. According to the supplied specifications, it has a density of 1.225 g/mL at 25°C, a boiling point of 129–133°C at 18 mmHg, a flash point above 230°F (approximately 127°C), and a vapor pressure of 2 Pa at 20°C. Its physical appearance may vary with temperature and product purity.
2,6-TDI is soluble in certain organic solvents, including benzene and acetone. It reacts with water, potentially releasing carbon dioxide and generating heat, and may undergo rapid polymerization under certain conditions, particularly in the presence of alkalis. It is also incompatible with strong oxidizing agents and requires careful handling and storage in accordance with its Safety Data Sheet (SDS).
As a reactive aromatic diisocyanate, 2,6-TDI is used in the synthesis of polyurethane materials and related polymer systems. Potential applications include selected polyurethane foams, coatings, and elastomers, depending on the formulation and manufacturing process.
Product Parameters
| 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 |
Application Scenarios
Toluene-2,6-diisocyanate is an aromatic diisocyanate used in the synthesis of polyurethane materials. Its potential applications include the production of polyurethane foams for bedding, furniture cushioning, and automotive seating, as well as selected sealants and adhesives. Its suitability for these applications depends on the formulation, the use of other polyisocyanates or polyols, and the specific performance requirements of the finished product.
