So, we have here "red mercury" discovered by the soviets in 1968!!! of course all over world labs sell it under restricted orders!!! However, this chemical is also supllied under another name, antimony III oxide, however, its also called "Technetium (/tɛkˈniːʃiəm/) is a chemical element with symbol Tc and atomic number 43. All of its isotopes are radioactive" 

and special used as..... " technetium-99m is a metastable nuclear isomer of technetium-99 (itself an isotope of technetium), symbolized as 99mTc, that is used in tens of millions of medical diagnostic procedures annually, making it the most commonly used medical radioisotope."