Dicyclopentadiene molecular formula C10H12, colorless crystals, has a camphor odor. The relative density is 0.979 (20/20 ° C). Boiling point: 170 ° C (decomposed). The freezing point is 31.5 ° C. Refractive index nD (35 ° C) 1.5061. Flash point is 32.22 ° C. Auto-ignition point: 680 ℃. Soluble in alcohol. This product has two kinds of isomers of α and β, the freezing point of α isomer is 33 ℃, and the freezing point of β isomer is 19.5 ℃. Dicyclopentadiene mainly contains the alpha isomer and has a boiling point of 170 ° C. Because this product contains double bonds, it is easy to carry out addition reaction and self-polymerization reaction.
Dicyclopentadiene is mainly used in the manufacture of medicines, pesticides and resins. This product is toxic, with paralytic and local irritation. Acute poisoning can cause coma. The oral LD50 of dicyclopentadiene rats was 820 mg / kg body weight, and the LD50 absorbed by rabbits through the skin was 6.72 ml / kg body weight. The main pathological changes of oral poisoning in rats are extensive congestion and hemorrhage of lung, stomach, intestine, kidney and bladder. The device and equipment containers should be sealed, the ventilation should be enhanced, and the maximum allowable concentration in the air should be 5mg / m3. Operators should wear protective gear. Acute poisoning should be removed to fresh air and treated as a general narcotic poisoning.