A defoamer is a chemical additive used to reduce or eliminate foam in various industrial processes. Foaming can occur in liquids during mixing, heating, or chemical reactions, which can hinder production efficiency and product quality. Defoamers work by destabilizing the foam structure, allowing bubbles to collapse and reducing surface tension. These additives are commonly used in industries such as food and beverage, pharmaceuticals, and pulp and paper. Defoamers can be made from various materials, including oils, silicones, and surfactants, and are selected based on the specific application and compatibility with other ingredients.