Used as a moisture indicator in silica gel desiccants and other materials like paper, where it changes color from blue to pink upon absorbing water, providing a visual sign of humidity exposure.

Commonly employed in electroplating baths to deposit cobalt metal for wear-resistant and magnetic coatings.

Serves as a catalyst precursor in industrial reactions, including Fischer-Tropsch synthesis and oxidation processes.

Utilized in the preparation of cobalt-based pigments and dyes for ceramics, paints, textiles, and leather industries.

Also used in laboratories as a reagent for detecting the presence of water in solvents and as a source of cobalt ions in analytical chemistry.

In biological research, it is used to simulate hypoxic conditions in cells, aiding in the study of cellular responses to oxygen deprivation.