U+29B5 "⦵" Circle with Horizontal Bar Unicode Character
Unicode Version 17.0
⦵
U+29B5 "⦵" Circle with Horizontal Bar is a mathematical symbol primarily used in chemistry and thermodynamics to denote a standard state or standard conditions, such as for standard enthalpy or standard Gibbs free energy. It appears as a circle bisected by a horizontal line, distinguishing it from similar symbols like the empty set or the degree sign. This character falls within the Miscellaneous Mathematical Symbols-B block and is often employed in scientific notation to specify baseline values for reactions under defined pressures and temperatures.
General Properties
| Code Point | U+29B5 |
| Version Added | 3.2 |
| Name | Circle with Horizontal Bar |
| Block | Miscellaneous Mathematical Symbols-B |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
Encodings
| HTML Decimal Encoding | ⦵ |
| HTML Hex Encoding | ⦵ |
| UTF-8 Encoding | 0xE2 0xA6 0xB5 |
| UTF-16 Encoding | 0x29B5 |
| UTF-32 Encoding | 0x000029B5 |
| C/C++/Java Escape | \u29b5 |
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 |
| Pattern Syntax | Yes |
| Math | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |