Potassium nitrate, also known as saltpeter, is a chemical compound with the formula KNO3. It is a naturally occurring mineral that is commonly used for various industrial, agricultural, and culinary purposes.

One of the primary uses of potassium nitrate is as a fertilizer in agriculture. It provides essential nitrogen and potassium nutrients to plants, promoting healthy growth and increasing crop yields. Additionally, potassium nitrate is used in the production of fireworks and explosives due to its oxidizing properties