The first to go would be chlorine gas, then the carbonate products.

FORBES: Magazine Article

It heard that when police raided Mr Railton's home last October he was found to have 98 different chemicals, including some that could make chlorine gas.

BBC: Man denies 'planned poison attack on bus' in Surrey

The jury was told that when police raided his home last October he was found to have 98 different chemicals, including some that could make chlorine gas.

BBC: Man 'planned poison attack on bus' in Surrey

Chlorine gas was used by both sides during World War I but was banned by the Geneva Protocol, along with the use of other poison gases, after the end of the war.

CNN: Al Qaeda's track record with chemical weapons

The chlorine gas is captured and sold.

FORBES: Magazine Article

Chlorine is volatized in hot water meaning it turns into a gas that you then breathe.

FORBES: 10 Easy Ways To Celebrate Earth Day

Neutrinos react with chlorine in the fluid and change it to radioactive argon, a gas.

ECONOMIST: Particle physics