Ammonium pertechnetate is a chemical compound with the formula NH4TcO4. It is the ammonium salt of pertechnetic acid. The most common form uses 99Tc. The compound is readily soluble in aqueous solutions forming ammonium and pertechnetate ions.
Synthesis
It can be synthesized by the reaction of pertechnetic acid and ammonium nitrate:
HTcO4 + NH4NO3 → NH4TcO4 + HNO3It thermally decomposes under inert atmosphere at 700 °C to technetium dioxide:
NH4TcO4 → TcO2 + 2 H2O + 1/2 N2Chemical properties
Passing hydrogen sulfide through acidic solutions of ammomium pertechnetate produces Technetium(VII) sulfide:234
2NH4TcO4 + 7H2S + 2HCl → Tc2S7↓ + 2NH4Cl + 8H2OReferences
"Ammonium pertechnetate[99Tc]". https://pubchem.ncbi.nlm.nih.gov/compound/9577286#section=Top ↩
Boschke, Friedrich L. (31 December 1981). Inorganic Chemistry. Walter de Gruyter GmbH & Co KG. p. 131. ISBN 978-3-11-270829-3. Retrieved 23 July 2024. 978-3-11-270829-3 ↩
"CharChem. Technetium(VII) sulfide". easychem.org. Retrieved 23 July 2024. http://www.easychem.org/en/subst-ref/?id=5762&langs=%2A ↩
Poineau, Frederic; Burton-Pye, Benjamin P.; Sattelberger, Alfred P.; Czerwinski, Kenneth R.; German, Konstantin E.; Fattahi, Massoud (2018). "Speciation and reactivity of heptavalent technetium in strong acids". New Journal of Chemistry. 42 (10): 7522–7528. doi:10.1039/c7nj04912a. Retrieved 23 July 2024. https://istina.ipmnet.ru/publications/article/134243400/ ↩