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.

General Properties

Code Point	U+1F745
Version Added	6.0
Name	Alchemical Symbol for Alum
Block	Alchemical Symbols
General Category	Other Symbol
Canonical Combining Class	Not Reordered
Bidirectional Class	Other Neutral

Encodings

HTML Decimal Encoding	🝅
HTML Hex Encoding	🝅
UTF-8 Encoding	0xF0 0x9F 0x9D 0x85
UTF-16 Encoding	0xD83D 0xDF45
UTF-32 Encoding	0x0001F745
C/C++/Java Escape	\ud83d\udf45

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
NFKC Quick Check	Yes
NFKD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Script	Common
Script Extensions	Common
Indic Syllabic Category	Other
Vertical Orientation	Upright
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Other
Sentence Break	Other