Sodium Nitrite As Preservatives

Sodium nitrite is a white crystalline salt. It is produced industrially by combining nitrogen oxides with sodium hydroxide or sodium carbonate. It is often used in cured meats to preserve them and give them a pink color.

Sodium nitrite is primarily used as a preservative in cured meats like bacon, ham, and hot dogs. It prevents the growth of bacteria, particularly Clostridium botulinum, which causes botulism. It also contributes to the characteristic pink color and flavor of cured meats.

Sodium nitrite is an approved food additive in the US. When used in cured meats, it can form nitrosamines, some of which are considered possibly carcinogenic by IARC. However, regulatory bodies like the FDA and EFSA have evaluated sodium nitrite and determined it is safe at permitted levels in cured meats, citing its role in preventing botulism. JECFA has also evaluated it. Evidence on the health effects of sodium nitrite is mixed, with ongoing research into its potential risks and benefits.