Potassium nitrate

Potassium nitrate, also known as saltpeter, is a chemical compound made of potassium, nitrogen, and oxygen. It appears as a white, crystalline solid and is commonly used in fertilizers to promote plant growth due to its rich nitrogen content. Additionally, it has applications in food preservation—particularly in curing meats—because it inhibits bacterial growth. Potassium nitrate is also an important ingredient in explosives and fireworks, where it acts as an oxidizer to produce the energetic reactions needed for combustion. Its versatility stems from its chemical properties, making it valuable across agriculture, food industry, and pyrotechnics.