Gunpowder

Gunpowder, formerly known as sulphur, is an item that can be obtained by killing Creepers, Ghasts,  Witches, or looting dungeon chests.

Uses
Gunpowder is used to craft TNT, fire charges, firework stars, and firework rockets and can be brewed with any potion to make a splash potion. Fire charges were added in snapshot 12w04a, and have the same properties as flint and steel, except if launched from a dispenser.

Trivia

 * Although gunpowder has the appearance of gray redstone dust, it cannot be placed on the ground as a wire.
 * In the new 1.5 texture pack format, Gunpowder's sprite is called "sulphur.png".
 * Put it in guns to make it go, "Pew, pew, pew!"

Schießpulver Sulphur/es Poudre à canon Puskapor 화약 Buskruit Proch pt-br:Gunpowder Порох 火药