Aminobenzenearsonic Acid, also known as arsanilic acid, is an organic compound commonly used as a feed additive in the livestock industry. It possesses antimicrobial properties and aids in controlling the growth of bacteria in animal feed. Synonymous with its chemical name, it is also referred to as 4-aminobenzenearsonic acid or 4-aminophenylarsonic acid. This chemical compound is a white crystalline solid that is highly soluble in water. Additionally, it can be called 4-ASA or simply arsanilate. Aminobenzenearsonic Acid plays a crucial role in maintaining the health and wellbeing of the animals consuming it, ensuring their growth and productivity.