from Wiktionary, Creative Commons Attribution/Share-Alike License.
sodium nitratewhen used as a preservative
Sorry, no etymologies found.
Vampires are tale type E251: "Vampire: Corpse which comes from grave at night and sucks blood", but there are a ton of little details and stories to follow up on in there.
Both sodium nitrite (E250) and sodium nitrate (E251) are permitted for cured meats. yes, but only the former is linked to health risks.