1911 Encyclopædia Britannica/Copperas

COPPERAS (Fr. couperose; Lat. cupri rosa. the flower of copper), green vitriol, or ferrous sulphate, FeSO₄·7H₂O, having a bluish-green colour and an astringent, inky and somewhat sweetish taste. It is used in dyeing and tanning, and in the manufacture of ink and of Nordhausen sulphuric acid or fuming oil of vitriol (see Iron).

This article is issued from Wikisource. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.