Ammonium propionate is the ammonium salt of propionic acid, with the chemical formula C3H7NO2 or CH3CH2COONH4. It is a white crystalline solid that is highly soluble in water. This compound is formed by the neutralization of propionic acid with ammonia. Its primary industrial application is as a preservative and mold inhibitor, particularly in the animal feed industry. It functions by releasing propionic acid, which lowers the pH and exhibits antimicrobial activity against fungi and bacteria, thereby extending the shelf life of feed. It is also investigated for use in other materials, such as wood, to prevent biological degradation. Additionally, in laboratory settings, ammonium propionate can serve as a source of ammonia or as a buffer component in specific chemical and biochemical processes. Handling requires standard safety precautions for laboratory chemicals. It should be stored in a cool, dry place away from strong oxidizing agents.