What is the main use of sulfur?

Sulfur is an element used for everything from adhesives to matches. It's most common use is as a

hardening agent in the manufacture of rubber products, such as tires.

I'm not really a chemist, but I think the principle use is in fertilizers. One of the real chemists on Profr. will be able to give you a more complete answer. It is also important ingredient in the production of gunpowder I believe. 

the main use of sulfur is in the production of sulfuric acid and its also about 65% of sulfuric acid produced is used to make fertilizer

sulfur is also called brimstone, it is used to produce black gunpowder. in dermatology,sulfur is used to cure skin problems.

Sulphur is used in :

1) Preparation of  SO_2.

2)Making gun powder,  matches and fireworks.

3)Is used in vulcanization of rubber.

4)Is used as fungicide and insecticide in fields.

5) Is used in  making ointments for skin diseases.

Its main use is in the preparation of sulfur dioxide which is used in manufacturing of sulphuric acid.

Used in vulcanization of rubber.

Used in fungicide and insecticides.

Used in ointments for curing diseases.

Used in parlors to give specific shapes to hair.