Check the listing for details. Ferric Chloride, 100g Patina, Copper, Brass, Bronze, Jewelry, Sculpture. Condition: New. Listed at 12.95 USD. Ferric Chloride, 100g, Lab Grade Ferric Chloride is also called Iron(III) Chloride. It is soluble in water and alcohol and is non-combustible. It is popularly used in copper patina solutions. When dissolved in water, ferric chloride undergoes hydrolysis and gives off heat in an exothermic reaction. The resulting brown, acidic, and corrosive solution is used as a flocculant in sewage treatment and drinking water production, and as an etchant for copper-based metals in printed circuit boards. Ships only to the lower 48 states and Canada via Ground, Limited Quantity service. No air delivery allowed. Chemical Formula: FeCl3 Appearance: Dark green to black powder Chemical Grade: Lab, anhydrous Quantity: 100g CAS: 7705-08-0 Please see our Patinas for Metal Artists page for a list of popular chemical patina recipes.