Sodium Nitrate

Sodium nitrate is a white crystalline salt that occurs naturally in some vegetables. It is produced industrially by reacting sodium nitrite with nitrogen oxides or by synthesizing it from ammonia. It is often used as a food additive.

Sodium nitrate is used as a preservative and to enhance the color and flavor of cured meats like bacon, ham, and hot dogs. It helps prevent the growth of harmful bacteria, such as Clostridium botulinum, and contributes to the characteristic pinkish-red color of cured meats.

In the US, sodium nitrate is permitted as a food additive. Regulatory bodies like the Joint FAO/WHO Expert Committee on Food Additives (JECFA) and the European Food Safety Authority (EFSA) have evaluated sodium nitrate. Concerns have been raised about the potential formation of nitrosamines, which are formed when nitrates and nitrites react with amines in the body or during cooking, and have been linked to cancer in animal studies. However, evidence in humans is mixed, and the International Agency for Research on Cancer (IARC) has classified processed meats containing sodium nitrate as carcinogenic to humans.