Sodium nitrite is used as a food preservative and color fixative in food and beverage production. It helps to prevent the growth of bacteria and inhibit the formation of harmful microbial toxins, thereby extending the shelf life of processed meats, such as bacon, ham, hot dogs, and sausages. It also contributes to the desired pink color in cured meats. Additionally, sodium nitrite prevents the oxidation and rancidity of fats, enhancing the flavor, texture, and overall quality of various processed food products. However, it is important to note that excessive consumption of sodium nitrite can be harmful, hence it is regulated by authorities to ensure safe usage levels.