Ammonium ozonide

Ammonium ozonide is an oxygen rich molecule containing an ammonium cation (NH₄⁺) and an ozonide anion (O₃⁻). Ammonium ozonide, like alkali ozonides, is a red solid.^[1][2] Ammonium ozonide is stable at low temperatures, but it decomposes to ammonium nitrate at temperatures above -70 °C.^[2]

Ammonium ozonide

Identifiers
CAS Number	12161-20-5 Y
3D model (JSmol)	Interactive image
InChI InChI=1S/H3N.HO3/c;1-3-2/h1H3;1H Key: QNCFLJHTDUIYDM-UHFFFAOYSA-N
SMILES [NH4+].[O-]O[O]
Properties
Chemical formula	H4NO3
Molar mass	66.036 g·mol−1
Appearance	Deep red solid
Related compounds
Other anions	Ammonium nitrate
Other cations	Potassium ozonide Caesium ozonide Tetramethylammonium ozonide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Preparation and decomposition

Ammonium ozonide is made by bubbling gaseous ozone through liquid ammonia at -110 °C.^[1][2] This method suffers from a low yield.^[1]

12 NH₃ + 11 O₃ → 9 NH₄O₃ + 3 NO₂

Ammonium ozonide decomposes into ammonium nitrate, oxygen gas, and water. If the above reaction is done at high temperatures, these decomposition products result immediately and no ozonide is formed.^[1]

4 NH₄O₃ → 2 NH₄NO₃ + O₂ + 4 H₂O