What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called?

C. Gun Powder

Gunpowder is a mixture of potassium nitrate (saltpeter), powdered charcoal, and sulfur. This mixture was invented in China over a thousand years ago and was initially used primarily in the manufacture of fireworks. Later, it was adopted for use in weapons, including firearms and cannons, due to its flammability and explosive properties. The burn rate of gunpowder can be controlled by varying the ratios of the three components, making it possible to use it for different purposes such as propelling projectiles or creating a flash and bang for special effects.