Potassium fluoride,anhydrous
           Potassium fluoride,extra pure
           Potassium fluoride,Granular
           Silicon Dioxide
           Hydrofluoric acid
           Synthetic Cryolite
           Potassium Fluoaluminate
           Ammonium bifluoride
           Potassium Bifluoride
           Aluminium fluoride
           Sodium fluoride
           Potassium Fluorosilicate
           Fluorosilicic Acid
           Sodium silicofluoride
           Potassium Hydroxide Flakes
           Magnesium Fluoride
           Magnesium fluorosilicate
           Barium Fluoride
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Hydrogen fluoride gas is one of the largest toxic air pollutants, through a variety of industrial processes is discharged into the atmosphere. Hydrofluoric acid to plant damage mainly in the form of gas after entering the plant, affecting a variety of physiological processes in plants. Plant responses to atmospheric fluoride affected by many factors, attributed some of the plant itself, while others from the plant growth environment. On the one hand the level of plant growth environment in a variety of plant mineral nutrition can affect sensitivity to hydrogen fluoride, on the other hand will affect fluoride content in plants mineral nutrition.

Hydrofluoric acid is harmful to the environment. It was long ago found that low calcium content of tomato plants more susceptible to harm than high in calcium fluoride tomato plants, and will be treated with calcium to reduce the reaction caused by the fluorine, such as the use of Calcium hurt by fluorine tomato, formed on Gladiolus leaf blight spot reduction, the findings also show that Garrec geranium leaves fluorine presence would lead to the accumulation of calcium in the same site, and automatically moves these calcium fluoride accumulation site. So it is considered that calcium fluoride can reduce damage.

Based on the above, we choose calcium-containing compound (calcium chloride, calcium hydroxide) in the experiment as a first class fluorine pollution repellant. The study found that fluoride damage and free radical activity of the plant is closely related, so we chose a radical scavenger sodium benzoate and ascorbic acid as a second class repellant fluorine pollution(such as hydrofluoric acid).