potassium nitrite
Inorganic compound with formula KNO₂, used as a food additive (color fixative) and in analytical chemistry.
Potassium nitrite is sometimes used as a food additive.
Sodium nitrite (NaNO₂), more common as a food preservative; potassium salt is less frequently used.
Compound of 亜硝酸 (nitrous acid) and カリウム (potassium), following standard inorganic nomenclature.