Ammonium pertechnetate

Ammonium pertechnetate
	; Ammonium pertechnetate
Names
	IUPAC name Ammonium pertechnetate
Identifiers
CAS Number	34035-97-7;
3D model (JSmol)	Interactive image;
ChemSpider	7851725 ;
PubChem CID	9577286;
	InChI InChI=1S/H2O.3O.Tc/h1H2;;;;/q;;;;+1/p-1 Key: WJULHBIORCQBSY-PUQAOBSFSA-O ;
	SMILES [O-][Tc](=O)(=O)=O.[NH4+];
Properties
Chemical formula	H4NO4Tc
Molar mass	180 g·mol−1
Related compounds
Other anions	Ammonium nitrate
Other cations	Sodium pertechnetate; Potassium pertechnetate; Calcium pertechnetate
Related compounds	Perchloric acid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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]

2NH₄TcO₄ + 7H₂S + 2HCl → Tc₂S₇↓ + 2NH₄Cl + 8H₂O

References

^ "Ammonium pertechnetate[99Tc]".
^ 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.
^ "CharChem. Technetium(VII) sulfide". easychem.org. Retrieved 23 July 2024.
^ 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.

[1] "Ammonium pertechnetate[99Tc]".

[2] 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.

[3] "CharChem. Technetium(VII) sulfide". easychem.org. Retrieved 23 July 2024.

[4] 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.

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