Gunpowder was first used in China in the 800s. They used gunpowder in fireworks.
Gunpowder was probably used for the first time in Europe during the Battle of Crécy in 1346
At first the gunpowder were used in fireworks, it was during the Ming Dynasty that gunpowder were really used for fire arms.
The Chinese. They used it in their fireworks.
It is not possible to say who first invented gunpowder. It was certainly used by the Chinese long before the west
KNO3 is used in gunpowder, so yes a nitrate is in gunpowder.
919 A.D. They first used it for cannons
I'm guessing you mean why it was not used for defense or weaponary. The answer is that the Chinese did not find a weaponary use for gunpowder, they used it mainly for fireworks. The Europeans were the first to use gunpowder for weapons.
Firearms (guns using gunpowder) were first used in ancient China.
It was used to make fireworks, small bombs, explosives,firearms,and cannons .