Assertion: potassium nitrate | /r/ObjectUse | used for food preservation
Facets:
Source sentences:
text: Potassium nitrate, like sodium nitrate, is also used for food preservation, especially in cured meats such as cured bacon and chorizo.
text: Other potassium compounds of economic value include potassium nitrate, also known as saltpetre, or nitre, KNO 3 , which has wide use as a fertilizer and in fireworks and explosives and has been used as a food preservative; potassium chromate, K 2 CrO 4 , which is employed in tanning leather and dyeing textiles; and potassium sulfate, K 2 SO 4 , which is used in the production of fertilizers and potassium alums.