Established in 1967, Stevens Metallurgical has been providing EM grade Osmium Tetroxide to the medical community for over 40 years. We offer Osmium Tetroxide minimum 99.95% purity in a wide range of packaging and forms, including crystalline, and 4% or 2% aqueous solutions. Stevens Metallurgical delivers top quality products at extremely competitive prices. Our service is reliable and timely. Most orders ship the day following receipt.