Ammonium sulphate is a common chemical compound that is widely used in agriculture and industrial processes. It is also known by a few synonyms that are worth knowing. One of the most common alternatives is the term "diammonium sulfate", which is a crystal salt with the chemical formula (NH4)2SO4. Another synonym for ammonium sulphate is "ammonium sulfate", which is often used interchangeably with the formal name. If you are looking for a more specific type of ammonium sulphate, you might use the term "crystallized ammonium sulfate", which refers to a purified form of the compound. Overall, while ammonium sulphate may be the most well-known name, there are plenty of other synonyms that can be used to describe this versatile chemical.