Ammonium pertechnetate explained

Ammonium pertechnetate is a chemical compound with the formula NH₄TcO₄. It is the ammonium salt of pertechnetic acid. The most common form uses ⁹⁹Tc.^[1] 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 + HNO₃

It thermally decomposes under inert atmosphere at 700 °C to technetium dioxide:

NH₄TcO₄ → TcO₂ + 2 H₂O + 1/2 N₂

Chemical properties

Passing hydrogen sulfide through acidic solutions of ammomium pertechnetate produces Technetium(VII) sulfide:^{[2] [3] [4]}

Notes and References

1. Web site: Ammonium pertechnetate[99Tc].
2. Book: Boschke . Friedrich L. . Inorganic Chemistry . 31 December 1981 . . 978-3-11-270829-3 . 131 . 23 July 2024 . en.
3. Web site: CharChem. Technetium(VII) sulfide . easychem.org . 23 July 2024.
4. Poineau . Frederic . Burton-Pye . Benjamin P. . Sattelberger . Alfred P. . Czerwinski . Kenneth R. . German . Konstantin E. . Fattahi . Massoud . Speciation and reactivity of heptavalent technetium in strong acids . New Journal of Chemistry . 2018 . 42 . 10 . 7522–7528 . 10.1039/c7nj04912a . 23 July 2024.