noun
hexafluorosilicic acid
A chemical compound used in industrial processes such as water fluoridation and metal surface treatment. Technical term.
ヘキサフルオロケイ酸は水道水のフッ化物添加に使われることがある。
Hexafluorosilicic acid is sometimes used for fluoridation of tap water.
From English 'hexafluorosilicic acid', a systematic chemical name.