U+3381 "㎁" Square Na Unicode Character
Unicode Version 17.0
㎁
U+3381 "㎁" Square Na is a typographic symbol that represents the standard abbreviation for the element sodium, where "Na" is enclosed within a square boundary to form a single composite character, primarily used in East Asian writing systems for compact and consistent formatting of chemical notations.
General Properties
| Code Point | U+3381 |
| Version Added | 1.1 |
| Name | Square Na |
| Unicode 1.0 Name | Squared Na |
| Block | CJK Compatibility |
| General Category | Other Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Square |
| Decomposition Mapping | "n" U+006E Latin Small Letter N "A" U+0041 Latin Capital Letter A |
Encodings
| HTML Decimal Encoding | ㎁ |
| HTML Hex Encoding | ㎁ |
| UTF-8 Encoding | 0xE3 0x8E 0x81 |
| UTF-16 Encoding | 0x3381 |
| UTF-32 Encoding | 0x00003381 |
| C/C++/Java Escape | \u3381 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Ideographic |
| East Asian Width | Wide |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "n" U+006E Latin Small Letter N "a" U+0061 Latin Small Letter A |
| NFKC Simple Casefold | "n" U+006E Latin Small Letter N "a" U+0061 Latin Small Letter A |
| 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 |