sulfurSulfur melts at 113°C and boils at 445°C. It has an unpleasant odor and is often found in toxic combinations. It is mostly found in nature in the form of sulfide. It is in minerals such as pyrite, galena, sphalerite, barite and gypsum.
In the 12th century was in China gunpowder invented, a mixture of potassium nitrate, charcoal and sulfur. It is used in the making of matches and the vulcanization of rubber.