This chemical is primarily used in the production of thermochromic materials, which change color in response to temperature variations. It is a key component in heat-sensitive papers, such as those used in fax machines, receipts, and labels. The compound’s ability to shift colors when exposed to heat makes it valuable for applications in security printing, where temperature changes can reveal hidden information or authenticate documents. Additionally, it is utilized in novelty items like mood rings and temperature-sensitive packaging to indicate product conditions. Its thermochromic properties also find use in educational tools for demonstrating thermal effects in a visually engaging manner.