The following uses for magnesium are gathered from a number of sources as well as from anecdotal comments. I'd be delighted to receive corrections as well as additional referenced uses (please use the feedback mechanism to add uses).
- used in flares and pyrotechnics, including incendiary bombs. It was used in flash photography,
- it is lighter than aluminium, and is used in alloys used for aircraft, car engine casings, and missile construction
- it is used a reducing agent for the production of uranium and other metals from their salts
- the hydroxide (milk of magnesia), chloride, sulphate (Epsom salts), and the citrate are used in medicine
- magnesium oxide is refractory and used as bricks and liners in furnaces
- used to make organomagnesium compounds (Grignard reagents), useful in organic synthesis
- used in computers for radio-frequency shielding