Arsanilic acid, identified by its CAS number 98-50-0, has a long and complex history, particularly within the veterinary sector. Initially recognized for its medicinal properties in human treatment, its application expanded significantly into animal husbandry. This organoarsenic compound was widely incorporated into animal feed formulations, primarily for its efficacy as a growth promoter and for its ability to prevent and treat common diseases in livestock, such as dysentery in swine and poultry.

The use of arsanilic acid as a veterinary feed additive was driven by its economic benefits, leading to improved feed conversion ratios and reduced mortality rates. Farmers and veterinarians alike relied on its properties to maintain herd health and optimize production. However, the persistent concerns surrounding arsenic toxicity and potential environmental impact have led to a re-evaluation and, in many regions, a discontinuation of its widespread use in animal feed. Understanding the historical context of arsanilic acid in animal feed is crucial for appreciating the evolution of veterinary pharmacology and the ongoing quest for safer, more effective alternatives.

The historical significance of arsanilic acid in animal health underscores the challenges and advancements in developing effective treatments for livestock. While direct purchase or buy of arsanilic acid might be restricted for many applications, its legacy continues to inform research into related compounds and their safe application. NINGBO INNO PHARMCHEM CO.,LTD. acknowledges the historical importance of compounds like arsanilic acid while focusing on contemporary solutions that balance efficacy with safety and regulatory compliance.