U+2621 "☡" Caution Sign Unicode Character
Unicode Version 17.0
☡
U+2621 "☡" Caution Sign is a graphic symbol that represents a general warning or alert, typically depicted as an exclamation mark inside a triangle. Originally included in the Unicode standard as part of the Miscellaneous Symbols block, it is intended for use in contexts where a caution or advisory notice is needed, such as on signage, labels, or in technical documentation. While it visually resembles a hazard symbol, it is distinct from the more common "Warning Sign" (U+26A0 ⚠), as the Caution Sign often conveys a less severe level of alertness. This character allows digital text to convey a visual sense of precaution without relying on images, making it useful in plain text environments or for basic typographic warnings.
General Properties
| Code Point | U+2621 |
| Version Added | 1.1 |
| Name | Caution Sign |
| Block | Miscellaneous Symbols |
| General Category | Other Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
Encodings
| HTML Decimal Encoding | ☡ |
| HTML Hex Encoding | ☡ |
| UTF-8 Encoding | 0xE2 0x98 0xA1 |
| UTF-16 Encoding | 0x2621 |
| UTF-32 Encoding | 0x00002621 |
| C/C++/Java Escape | \u2621 |
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 |
| Vertical Orientation | Upright |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |