Hexane is a colorless liquid with low toxicity and weak special smell. N-hexane is a kind of chemical solvent, which is mainly used in the polymerization of propylene and other olefins, the extraction agent of edible vegetable oil, the solvent of rubber and coating, and the diluent of pigment. It has certain toxicity. It can enter the human body through respiratory tract, skin and other channels. Long term contact can lead to chronic poisoning symptoms such as headache, dizziness, fatigue and numbness of limbs It can cause fainting, loss of consciousness, cancer and even death.