Sulphur dioxide – The gas with a cleansing edge


Sulphur is the tenth most abundant element in the universe. A brittle, non-metallic element, one of its oxides finds a myriad of uses in modern day industry.

Sulphur dioxide (SO2) is produced by burning sulphur or sulphur-containing compounds and can also be produced by burning coal and producing metals from their sulphides, such as copper sulphide.

Natural sources of SO2 are volcanoes and algae-producing di-methyl sulphide, which is converted to SO2 in the ambient atmosphere.

Sulphur dioxide can be liquefied under moderate pressures at room temperatures; the liquid freezes at -73°C and boils at -10°C under atmospheric pressure.

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