Sodium hexachloroplatinate (IV) is primarily used in the field of catalysis, where it serves as a precursor for various platinum-based catalysts. These catalysts are essential in a range of industrial chemical processes, including hydrogenation, dehydrogenation, and oxidation reactions.

In the electronics industry, it is utilized in the production of platinum coatings and films, which are critical for manufacturing components like electrodes and sensors. Its role in creating thin, conductive layers is vital for the performance and durability of electronic devices.

Additionally, it finds application in analytical chemistry as a reagent for the detection and quantification of certain ions, particularly potassium. Its ability to form specific complexes makes it valuable in qualitative and quantitative analysis.

In the field of materials science, sodium hexachloroplatinate (IV) is employed in the synthesis of platinum-containing materials, which are used in advanced technologies such as fuel cells and catalytic converters. These materials help in improving energy efficiency and reducing environmental pollution.

Overall, its applications span across various industries, contributing to advancements in chemical processing, electronics, and environmental technologies.