U-47931E (Item No. 20530) is an analytical reference standard that is structurally categorized as an opioid. It has been characterized as a selective µ-opioid receptor agonist, based on the ability of the antagonist β-funaltrexamine to block U-47931E-mediated decrease in urine output in water-loaded rats.¹ U-47931E has antinociceptive activity comparable to codeine (Item No. ISO60140) in mouse abdominal constriction and rat paw pressure tests.² This product is intended for research and forensic applications.

≥98%