Sodium nitrite is a food additive. Below are all the products whose label lists it, ordered just like the other lists.
Sodium nitrite (E250) – preservative. Sodium nitrite is used in cured meats such as sausages and ham to stop dangerous bacteria growing and keep the pink colour. The EU limits how much may be added.
Source: EU register of food additives (Reg. (EC) No 1333/2008) and EFSA.