Water-immiscible organic nitriles have been shown to selectively extract Cu from aqueous chloride solutions.

It has significant advantages when compared to the use of the acid zinc chloride solution or the highly toxic halogenated carbons for sink swim analysis.

It also dissolves in chloride solutions.

Thus, palladium(II) chloride solutions are sometimes used to test for the corrosion-resistance of stainless steel.

The electrolysis of chloride solutions all proceed according to the following equations:

Saturated sodium (or potassium) chloride solution is passed through the anode compartment, leaving at a lower concentration.

Filter the mixture, leaving iron(II) chloride solution.

It is used to etch copper on printed circuit boards as an alternative to ferric chloride solution.

Solutions of hypochlorites can be produced by electrolysis of an aqueous chloride solution.

Aqueous cuprous chloride solutions react with base to give the same material.