Explanatory notes
… synthesis; for pickling meat; in photography; as a rat‑poison, etc. (2) Potassium nitrite (KNO 2 ). Prepared by … Blue or green crystals, soluble in water, hygroscopic, poisonous. Used in pyrotechnics; in the dyestuff industry; … or white crystals or crystalline powder, soluble in water, poisonous. Used in pyrotechnics for green lights; in the …