Ammonium cerium(IV) nitrate, with the chemical formula (NH4)2Ce(NO3)6, is a chemical compound composed of ammonium ions (NH4+), cerium ions in the +4 oxidation state (Ce4+), and nitrate ions (NO3-). It is a yellow or orange crystalline solid.

Ammonium cerium(IV) nitrate is an important chemical in certain chemical reactions and applications, particularly in organic synthesis and analytical chemistry. Some key properties and uses include:

1. Oxidizing Agent: Ammonium cerium(IV) nitrate is a powerful oxidizing agent. It can transfer oxygen atoms to other substances during chemical reactions, facilitating oxidation processes.
2. Organic Synthesis: It is widely used in organic synthesis for various reactions, such as the conversion of alcohols to aldehydes or ketones and the oxidative cleavage of double bonds in organic compounds.
3. Testing of Alkenes and Alkynes: In analytical chemistry, ammonium cerium(IV) nitrate is used as a test reagent for the presence of alkenes and alkynes in organic compounds. The reagent produces characteristic color changes in the presence of these unsaturated compounds.
4. Cerium Ion Source: It is utilized as a source of cerium ions in certain chemical reactions and processes.

Ammonium cerium(IV) nitrate is a hazardous chemical and should be handled with care in a laboratory setting. It is considered toxic and can cause skin and eye irritation upon contact. Proper safety precautions, such as the use of personal protective equipment and appropriate ventilation, should be followed when working with this compound.

Due to its reactivity and usefulness as an oxidizing agent, ammonium cerium(IV) nitrate is an important tool in various chemical reactions, especially in organic synthesis and analytical chemistry. However, its use requires a good understanding of its properties and careful handling to ensure safety and successful outcomes in laboratory applications.