This standard refers to glycerin trinitrate or glycerin trinitic ester, in its industrial qualities. Nitroglycerin, the subject of this standard, is classified into two grades, designated Nitroglycerin-1 and Nitroglycerin-2, fundamentally characterized by their applications. Nitroglycerin-1 is used in the manufacture of war gunpowder; Nitroglycerin-2, in industrial type explosives!