#amoniu

• Volatile alkali — An archaic and historical designation used in chemistry and old pharmacy for ammonia (gas or an aqueous solution of ammonium hydroxide). The term highlights the substance's alkaline (basic) character and its pronounced capacity to evaporate rapidly at room temperature, releasing a strong, pungent, and suffocating odor.
• Amatol — A military explosive material composed of a homogeneous mixture of trinitrotoluene (TNT) and ammonium nitrate, widely used during World War I and World War II for filling artillery shells, aerial bombs, and naval mines.
• Ammophos — A granulated, complex, and concentrated chemical mineral fertilizer, obtained by neutralizing phosphoric acid with ammonia. This industrial compound mainly consists of monoammonium phosphate and diammonium phosphate, being widely used in agriculture due to its high water solubility, ensuring rapid and balanced plant assimilation of nitrogen and phosphorus during the early vegetation phases.
• Ammonal — An industrial and military explosive substance composed of a homogeneous mixture of ammonium nitrate, aluminum powder, and trinitrotoluene (TNT) or charcoal. The aluminum functions as a powerful thermal agent that considerably increases the temperature and blast of the explosion, making amonal ideal for large-scale mining operations or for charging heavy projectiles.
• Ammoniogenesis — The biochemical and physiological process of synthesis and production of ammonia or ammonium ions by the body's cells, located predominantly within the tubular cells of the kidneys. This cellular mechanism plays a fundamental role in maintaining the body's acid-base balance, allowing the excretion of excess hydrogen ions by binding them as ammonium in the urine.
• Ammonium — A monovalent chemical radical or positively charged polyatomic cation (NH4+), formed by attaching a proton to an ammonia molecule. It behaves chemically similarly to alkali metal ions, forming soluble crystalline salts (such as ammonium chloride or ammonium nitrate) that possess fundamental importance in cellular biochemistry, agricultural fertilizer manufacturing, and osmotic balance maintenance.
• Ammoniuria — The urinary excretion of ammonia or ammonium ions, representing an essential clinical indicator of how the kidneys regulate systemic acid-base balance. In states of metabolic acidosis, its values increase significantly due to the amplification of compensatory renal ammoniogenesis, transforming ammonium excretion into a physiological barrier against blood pH decrease.
• Ammonium hydroxide — An aqueous solution of ammonium hydroxide (NH₄OH), a clear, colorless liquid with a pungent, suffocating, and strongly alkaline odor, obtained by dissolving ammonia gas in water; it is widely used in the chemical industry as a laboratory reagent, in producing nitrogen fertilizers, cleaning agents, textiles, or as a refrigerant medium.
• Nitrate — A salt or ester of nitric acid containing the NO3 functional group; in common and agricultural language (often called nitrate), it refers to chemical fertilizers used for enriching the soil with nitrogen, whose excessive use can lead to the pollution of groundwater.