This wiki is about 0.17, the current experimental version of Factorio.
Information about 0.16, the current stable version of Factorio, can be found on stable.wiki.factorio.com.
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Sulfur is made from Water and Petroleum Gas. It is used mainly to convert Petroleum Gas into Sulfuric Acid. It can also be used to make Explosives.
This item is created in a Chemical plant.