Colorless, transparent or light yellow flammable liquid. There is a strong pungent odor. Miscible with ethanol (decomposition), diethylene glycol, ether, acetone, carbon tetrachloride, benzene, chlorobenzene, kerosene, and olive oil.

1. Prepared by the reaction of 2,4-diaminotoluene and phosgene. First, dissolve the solid diaminotoluene in chlorinated benzene, and heat it to 70°C with stirring to obtain a diaminotoluene chlorobenzene solution. The recovered phosgenated benzene oxide is put into a low-temperature phosgene pot and a certain amount of liquid light is added. After gasification, add drops of the prepared diaminotoluene solution from Chemicalbook while stirring, perform phosgenation at 40°C, then put the low-temperature phosgenation material into a high-temperature pot for high-temperature phosgenation, and aerate while heating up, for about 4 hours , the reaction is generally carried out at 120~125℃; after the reaction is completed, it is obtained by purging with nitrogen, distilling, and rectifying.