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Technetium-99 (99 Tc) is an isotope of technetium which decays with a half-life of 211,000 years to stable ruthenium-99, emitting beta particles, but no gamma rays. It is the most significant long-lived fission product of uranium fission, producing the largest fraction of the total long-lived radiation emissions of nuclear waste .
4 is the starting material for most of the chemistry of technetium. Pertechnetate salts are usually colorless. [4] TcO − 4 is produced by oxidizing technetium with nitric acid or with hydrogen peroxide. The pertechnetate anion is similar to the permanganate anion but is a weaker oxidizing agent. It is tetrahedral and diamagnetic.
Technetium-99m (99m Tc) is a metastable nuclear isomer of technetium-99 (itself an isotope of technetium), symbolized as 99m Tc, that is used in tens of millions of medical diagnostic procedures annually, making it the most commonly used medical radioisotope in the world.
Five modern technetium-99m generators The first technetium-99m generator, unshielded, 1958. A Tc-99m pertechnetate solution is being eluted from Mo-99 molybdate bound to a chromatographic substrate A technetium-99m generator , or colloquially a technetium cow or moly cow , is a device used to extract the metastable isotope 99m Tc of technetium ...
Technetium 99m Tc albumin aggregated (99m Tc-MAA) is an injectable radiopharmaceutical used in nuclear medicine. It consists of a sterile aqueous suspension of Technetium-99m ( 99m Tc) labeled to human albumin aggregate particles.
Pertechnetate is one of the most available forms of technetium. It is structurally related to permanganate. The most prevalent form of technetium that is easily accessible is sodium pertechnetate, Na[TcO 4]. The majority of this material is produced by radioactive decay from [99 MoO 4] 2−: [1] [2] [99 MoO 4] 2− → [99m TcO 4] − + e −
Sodium pertechnetate is the inorganic compound with the formula NaTcO 4. This colourless salt contains the pertechnetate anion, TcO − 4 that has slightly distorted tetrahedron symmetry both at 296 K and at 100 K [ 2 ] while the coordination polyhedron of the sodium cation is different from typical for scheelite structure.
The dark red hygroscopic substance is a strong acid, with a pK a of 0.32, [2] as such it exists almost entirely as the pertechnetate ion in aqueous solution. The red color in solution is thought to be due to the formation of the polyoxometallate Tc 20 O 4− 68 , [ 3 ] while fresh HTcO 4 is white.