Ammonium periodate

Ammonium periodate
Names
	IUPAC name azanium;periodate
	Other names Ammonium tetraoxoiodate(VII)
Identifiers
CAS Number	13446-11-2 ;
3D model (JSmol)	Interactive image;
ChemSpider	8096374;
PubChem CID	9920739;
CompTox Dashboard (EPA)	DTXSID60432823;
	InChI InChI=1S/HIO4.H3N/c2-1(3,4)5;/h(H,2,3,4,5);1H3 Key: URGYLQKORWLZAQ-UHFFFAOYSA-N;
	SMILES [NH4+].[O-]I(=O)(=O)=O;
Properties
Chemical formula	H4INO4
Molar mass	208.939 g·mol−1
Appearance	colorless crystals
Density	3.056 g/cm3
Solubility in water	soluble
Hazards
	GHS labelling:
Pictograms
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ammonium periodate is a chemical compound with the chemical formula NH₄IO₄.^[1]^[2]

Synthesis

Ammonium periodate is formed by the reaction of periodic acid and ammonia solution:

HIO₄ + NH₄OH → NH₄IO₄ + H₂O

The compound forms colorless crystals of tetragonal system, spatial group I41/a, cell parameters a = 0.5938 nm, c = 1.2790 nm, Z = 4.

It is sparingly soluble in water and explodes when heated.^[3]^[4] The compound is used in analytical chemistry as an oxidizing agent.^[5]

^ Rao, Chintamani Nagesa Ramachandra (1975). Bibliography of Infrared Spectroscopy Through 1960. U.S. Department of Commerce, National Bureau of Standards. p. 1929. Retrieved 21 January 2025.
^ Levason, W.; Webster, M. (15 June 1999). "Ammonium tetraoxoiodate(VII)". Acta Crystallographica Section C Crystal Structure Communications. 55 (6): IUC9900052. Bibcode:1999AcCrC..55C0052L. doi:10.1107/S0108270199099394. Retrieved 21 January 2025.
^ Rezende, Armando de; Pantoya, Michelle L.; Tunega, Daniel; Aquino, Adelia J. A. (8 February 2024). "Prediction of Phase Transition and Ignition Sensitivity of Ammonium Periodate". The Journal of Physical Chemistry C. 128 (5): 2205–2214. doi:10.1021/acs.jpcc.3c07439. ISSN 1932-7447. Retrieved 21 January 2025.
^ EPA-600/2. Industrial Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency. 1980. p. 78. Retrieved 21 January 2025.
^ Inomata, Katsuhiko; Nakayama, Yukiharu; Kotake, Hiroshi (1 February 1980). "Quaternary Ammonium Periodate as a New Oxidizing Agent". Bulletin of the Chemical Society of Japan. 53 (2): 565–566. doi:10.1246/bcsj.53.565. ISSN 0009-2673. Retrieved 21 January 2025.