Used primarily as an animal feed additive, especially in poultry production, to promote growth and improve feed efficiency. It helps control certain intestinal parasites and pathogens, contributing to healthier livestock. After ingestion, it can be metabolized and excreted, but concerns have been raised about arsenic residues in meat and environmental contamination from manure runoff. Its use has led to regulatory scrutiny in many regions due to potential risks to human health and the environment.