Ammonium sulphate pure, also known as diammonium sulfate, is a commonly used inorganic salt with various applications across different industries. Here are some of the pure applications of ammonium sulfate:

1. Fertilizer: Ammonium sulphate pure is primarily used as a fertilizer in agriculture. It provides a high source of nitrogen and sulfur, which are essential nutrients for plant growth. The fertilizer is particularly beneficial for alkaline soils where nitrogen fertilizers like ammonium sulfate can help lower the pH level and improve nutrient uptake by plants.
2. Industrial applications: It finds applications in various industrial processes. Ammonium sulphate pure is used in the manufacturing of chemicals, such as ammonium persulfate, which is employed as an oxidizing agent in various industries. Ammonium sulfate is also used in the production of flame retardants, dyes, and pigments.
3. Food additive: It is listed as an approved food additive by regulatory agencies. It is sometimes used as a dough conditioner in baking to improve the texture and increase the volume of baked goods. However, its use in food is generally limited and regulated.
4. Protein purification: Ammonium sulfate precipitation is a common technique used in protein purification. By adding ammonium sulfate to a protein solution, it can cause the protein to precipitate out of solution, facilitating its separation from other components.
5. Laboratory reagent: Ammonium sulphate pure is utilized as a reagent in various laboratory procedures. It is often employed in biochemical and molecular biology experiments, such as protein crystallization, DNA precipitation, and buffer preparation.

It is important to note that while ammonium sulfate has several applications, it should be handled and used with care, following appropriate safety guidelines and regulatory requirements.