U+1F745 "🝅" Alchemical Symbol for Alum Unicode Character

U+1F745 "🝅" Alchemical Symbol for Alum is a typographic glyph belonging to the Alchemical Symbols block, specifically representing the substance alum, a double sulfate salt historically used in dyeing, medicine, and metallurgy. This symbol, like many alchemical signs, evolved from medieval and early modern European alchemical traditions where each symbol encoded a specific element or compound for use in laboratory texts and manuscripts. In Unicode, it is encoded in the Supplemental Symbols and Pictographs range and serves primarily as a historical and academic character, preserving the visual language of premodern chemistry for digital text and documentation.