Silver Chloride is commonly used for infrared optics in wide spectrum band from 0.4 µm to 30 µm. Silver Chloride is grown into small ingots by the sealed-ampoule Stock Barger techniques. It is usually available as a white crystalline solid. However, due to its light sensitivity it can turn a deep grey blue upon prolonged exposure to light. This is due to its decomposition to silver metal and chlorine.
Silver Chloride is very soft and shows (under pressure) cold liquidity. It is relatively insoluble in water, but can be dissolved in aqueous solutions of ammonia, potassium cyanide and sodium thiocyanate. It is corrosive in combination with metals, therefore binders has to consist of silver or teflon.
Silver Chloride (AgCl) is commonly used for infrared transmission windows, in gas and liquid sample cells used with infrared and FTIR spectrophotometers in place of Potassium Bromide (KBr) with aqueous samples that would attack KBr optics.