How Is Zinc Nitrite Prepared?

Zinc nitrite can be prepared by reacting zinc oxide or zinc metal with nitrous acid. The reaction typically takes place in aqueous solution and is catalyzed by a small amount of an acid such as hydrochloric acid. The resulting product is then isolated and purified using standard laboratory techniques such as filtration and recrystallization. It should be noted that zinc nitrite is an unstable compound and should be handled with care to avoid decomposition.