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Usually, ethylene is a colorless, slightly odorous gas with a density of 1.256 g/L, which is slightly less dense than air, hardly soluble in water, and easily soluble in organic solvents such as carbon tetrachloride. Ethylene is present in certain tissues and organs of plants and is converted from methionine under conditions of sufficient oxygen supply.

Ethylene is a basic chemical raw material for synthetic fibers, synthetic rubber, synthetic plastics (polyethylene and polyvinyl chloride), and synthetic ethanol (alcohol). It is also used in the manufacture of vinyl chloride, styrene, ethylene oxide, Acetic Acid, acetaldehyde, and ethanol. And dynamite, etc., can also be used as a ripening agent for fruits and vegetables, and is a proven phytohormone.

Ethylene is one of the largest chemical products in the world. The ethylene industry is the core of the petrochemical industry. Ethylene products account for more than 75% of petrochemical products and occupy an important position in the national economy. Ethylene production has been used as one of the important indicators to measure the development level of a country's petrochemical industry.

Physiological effects are: triple reaction, promoting fruit ripening, promoting leaf senescence, inducing adventitious roots and root hair, breaking dormancy of plant seeds and buds, inhibiting flowering of many plants (but inducing and promoting flowering of pineapple and its genus), in males and females In the same plant, the direction of sex differentiation of the flower can be changed in the early stage of flower development.