Diallymal impurities are chemical compounds that can be found in various substances, including food, pharmaceuticals, and industrial products. They are formed when diallylamine reacts with other chemicals, creating unwanted byproducts. These impurities can be harmful to human health and must be controlled and monitored to ensure product safety. Analytical methods are used to detect and quantify these impurities, and manufacturers must adhere to strict regulations to prevent their presence in final products.