Cadmium sulfate is an inorganic compound, which is often used in electroplating of electronic circuits. It is also used for biocatalytic etching of CdS nanoparticles and optical detection of analytes. In addition, a DNA based quantum dot sensor was developed to detect ibuprofen.

It can be used as cadmium battery and cadmium fertilizer. It is used as antiseptic and astringent in eye wash water. It is prepared by the reaction of metal cadmium, cadmium oxide or cadmium carbonate with sulfuric acid. Glass containing this substance is the most effective filter for ultraviolet light.