Gunpowder

Gunpowder, formerly known as Sulphur, is an item that can be obtained by killing a Creeper or Ghast and can be found in some dungeon chests.

Uses
Five units of gunpowder are needed to create a block of TNT.

Also, one can brew it with any potion to make a Splash Potion.

History
In Indev, mob drops were randomized, so when a Pig was killed it could drop gunpowder instead of Pork (seen here).

Gunpowder was renamed Sulphur in Beta 1.0, but reverted to its original term in version 1.3.

As of Pre-release 4 of the 1.9 update, gunpowder can be used in brewing to create splash potions.

Trivia

 * Ghasts are not a recommended source of gunpowder because they float and spawn in the Nether, increasing the chance that the item will drop into a lava lake or inaccessible area.

Schießpulver Sulphur/es Poudre à canon Gunpowder/ko Buskruit Proch Порох Gunpowder/ch