外觀性狀無色透明或淡黃色易燃液體。有強烈的刺激氣味。 與乙醇（分解）、二甘醇、乙醚、丙酮、四氯化碳、苯、氯苯、煤油、橄欖油混溶。

溶解性與乙醇（分解）、二甘醇、乙醚、丙酮、四氯化碳、苯、氯苯、煤油、橄欖油混溶。

熔點19.5~21.5℃

沸點247℃

密度1.22

蒸氣壓0.03 hPa ( 20 °C)

折射率1.5660 to 1.5700

閃點137 °C

儲存條件Store below +30°C.

溶解度與乙醚、丙酮、苯混溶

形態(tài)透明液體

顏色無色至淡黃色

氣味 (Odor)尖銳、刺鼻的氣味

爆炸極限值(explosive limit)0.9-9.5% (v/v)

水溶解性124mg/L at 25℃

LogP3.43 at 22℃

(IARC)致癌物分類2B (Vol. 39, Sup 7, 71) 1999

警示詞危險

危險品運輸編號2078

RTECS號NQ9490000

自燃溫度620°C

危險等級6.1(a)

包裝類別II

海關(guān)編碼29291090

毒性A designated hazardous waste (EPA). It is a colorless to yellow solid, melting at about 20°C. TDI and MDI (diphenylmethane diisocyanate) are used in the manufacture of polyurethane foams by reaction with polyhydroxy compounds. These foams are used for insulation, upholstering, etc. Exposure is commonly by inhalation of the vapor. Both TDI and MDI can cause irritation of eyes and mucous membranes, in severe cases leading to pulmonary edema. Sensitization to TDI is common and frequently rapid, leading to an allergic reaction and some loss of lung function. In the United Kingdom, the threshold limit value is 0.02 ppm for not more than 20 min, or 0.005 ppm for 8 h.