Beryllium sulfate ( BeSO₄) is an inorganic compound, a sulfate of beryllium. It is a white solid that is poorly soluble in water and alcohol, but soluble in dilute acids. Beryllium sulfate is found in nature in the form of the mineral beryl.

1. Manufacture of special glass and ceramics: Beryllium sulfate can be used in the production of certain types of special glass and ceramics because of its ability to improve the thermal stability and mechanical strength of the product. For example, it was used to make lenses for microscopes and telescopes.

2. Nuclear industry: Beryllium sulfate has been used in nuclear reactor components and control systems due to its high melting point and good neutron moderation properties.

3. Catalyst: Beryllium sulfate can be used as a catalyst for certain chemical reactions, especially in organic synthesis.

4. Lubricants: Beryllium sulfate can be used as a lubricant in extreme conditions, such as high temperatures or radioactive environments.

5. X-ray fluoroscopy: Beryllium sulfate was once used as a contrast agent for X-ray fluoroscopy, but this use has decreased due to its toxicity.

6. Preservative: Beryllium sulfate can be used as a wood preservative, especially in situations where protection from fungal and insect damage is required.

7. Metal refining: Beryllium sulfate can be used to refine beryllium metal from minerals, although this is not the primary refining method.