Explanatory notes
… air. The solid chloride is used in organic synthesis, as a mordant in dyeing, etc. In aqueous solutions it is used for … iron chloride on the market is a dark red aqueous solution. More widely employed than ferrous chloride, e.g., for … photo‑engraving, to give a patina to iron, in medicine (haemostatic or vasoconstrictive preparations), and, …