What Is The Active Ingredient In Stump Remover?

What Is The Active Ingredient In Stump Remover? Tree stump removers contain potassium nitrite or sodium metabisulfite, which are both effective. Bonide Stump-Out contains sodium metabisulfite, which decomposes stumps gradually. Will bonide stump out kill a tree? The only way to kill a tree is by cutting the tree down and applying a stump killer