2,4-diisocyanato-1-methylbenzene

2,4-diisocyanato-1-methylbenzene is an aromatic diisocyanate compound with the molecular formula C9H6N2O2 and CAS number 584-84-9. This chemical belongs to the toluene diisocyanate (TDI) family and has a molecular weight of 174.16 g/mol. It is classified as a hazardous substance with significant health risks including carcinogenic potential, acute toxicity, and respiratory sensitization properties.

2,4-diisocyanato-1-methylbenzene is typically a colorless to pale yellow liquid at room temperature with a sharp, pungent odor. As an isocyanate compound, it is reactive with water and alcohols, forming polyurea and urethane linkages respectively. The substance has low water solubility but dissolves well in organic solvents. Its reactive nature makes it sensitive to moisture and heat.

2,4-diisocyanato-1-methylbenzene is primarily used in the production of polyurethane foams, coatings, adhesives, and elastomers. It serves as a key building block in flexible polyurethane foam manufacturing for furniture, automotive seating, and insulation materials. The compound is also utilized in specialty coatings, sealants, and as an intermediate in pharmaceutical and agricultural chemical synthesis.

Safe handling of 2,4-diisocyanato-1-methylbenzene requires comprehensive personal protective equipment including respiratory protection, chemical-resistant gloves, and eye protection. Work should be conducted in well-ventilated areas or under fume hoods due to its respiratory sensitization properties. Given its Acute Tox. 2 and Carc. 2 classifications, minimize exposure time and ensure proper training for all personnel handling this substance.

2,4-diisocyanato-1-methylbenzene must be stored in tightly sealed containers in a cool, dry place away from moisture, heat sources, and incompatible materials. Keep containers away from water, alcohols, amines, and strong bases which react violently with isocyanates. Storage areas should be well-ventilated and equipped with appropriate emergency equipment. Temperature control is essential to prevent decomposition.

In case of skin contact with 2,4-diisocyanato-1-methylbenzene, immediately remove contaminated clothing and wash affected area with plenty of water for at least 15 minutes. For eye contact, flush with water and seek medical attention. If inhaled, move to fresh air immediately and seek medical help due to respiratory sensitization risks. Never induce vomiting if ingested. Seek immediate medical attention in all exposure cases.

2,4-diisocyanato-1-methylbenzene waste must be disposed of through licensed hazardous waste contractors in accordance with local and European waste regulations. The substance cannot be disposed of in regular waste streams due to its toxicity and carcinogenic properties. Containers should be triple-rinsed and the rinse solutions treated as hazardous waste. Incineration at high temperatures in specialized facilities is typically required.

2,4-diisocyanato-1-methylbenzene is classified as ADR Class 6.1 (Toxic substances), Packing Group II, requiring specialized transport procedures. Packages must bear appropriate hazard labels and comply with ADR packaging requirements. Transport vehicles need proper placarding and emergency equipment. Drivers must hold ADR certification for Class 6.1 substances, and transport documents must include emergency response information.

2,4-diisocyanato-1-methylbenzene is subject to comprehensive European regulations including REACH registration requirements and CLP classification obligations. While not currently listed as an SVHC, its Carc. 2 classification means it falls under carcinogen handling regulations. Users must comply with occupational exposure limits, implement risk management measures, and may require authorization for certain uses under REACH Annex XIV restrictions.

2,4-diisocyanato-1-methylbenzene is available through OYSI, a specialized European distributor of industrial chemicals. As a professional chemical supplier, OYSI can provide this regulated substance to qualified industrial customers with appropriate handling capabilities and regulatory compliance. Given the substance's hazardous nature and regulatory requirements, procurement is limited to professional industrial applications with proper safety infrastructure.