Ebselen oxide is primarily recognized for its role as an intermediate in the synthesis of ebselen, a compound with significant antioxidant and anti-inflammatory properties. It is utilized in research settings to study the mechanisms of oxidative stress and cellular protection. The compound has shown potential in preclinical studies for treating conditions related to oxidative damage, such as neurodegenerative diseases and stroke. Additionally, ebselen oxide is investigated for its ability to mimic the activity of glutathione peroxidase, an enzyme that helps protect cells from oxidative damage. Its applications extend to exploring therapeutic strategies for various inflammatory and oxidative stress-related disorders.