What ingredients do gunpowder contain?

Gunpowder, also known as black powder, primarily contains three key ingredients: potassium nitrate (saltpeter), charcoal, and sulfur. Potassium nitrate acts as an oxidizer, providing oxygen for the combustion of the other components. Charcoal serves as the fuel, while sulfur helps to lower the ignition temperature and increase the combustion rate, enhancing the overall effectiveness of the mixture.