E-252, also known as sodium nitrite, is a food additive commonly used as a preservative and color fixative in processed meats. It helps prevent the growth of harmful bacteria, particularly Clostridium botulinum, which can cause botulism. E-252 also contributes to the characteristic pink color of cured meats. In addition to its use in food, E-252 has applications in the chemical industry and is utilized in the production of dyes and pharmaceuticals. While it is generally recognized as safe when used in small amounts, excessive consumption of sodium nitrite can pose health risks, including the formation of potentially harmful compounds in the body.