ヘキサフルオロケイ酸さんヘキサフルオロケイさんMeanings1nounhexafluorosilicic acidchemistry›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さんは水すい道どう水すいのフッ化か