คุณลักษณะ

• Fluoride is a natural environmental substance that is widely distributed in nature. Since fluoride in soil is taken up by the human body through groundwater and agricultural products, the standard value of leaching amount (0.8 mg/L) has been established in the Soil Pollution Control Law. In addition, there are also many cases of groundwater influx of fluoride due to soil contamination of fluoride in factories and workplaces.