Biohazard sign (☣) is Unicode U+2623 in the Miscellaneous Symbols block. It marks biological hazard risk (lab waste, infectious materials, and related safety copy). HTML has no standard named entity — use numeric or CSS forms (or type the character in UTF-8).
Remember
Character ☣
Unicode U+2623
Hex entity ☣
Decimal ☣
Named entity (none)
CSS escape \2623
Not the same ☢ U+2622 (radioactive)
All of these produce the same glyph: ☣. Prefer typing ☣ in UTF-8 when you can; use ☣ / ☣ or CSS for generated content.
Biohazard sign using Hex Code: ☣
Biohazard sign using HTML Code: ☣
Biohazard sign using CSS Entity: ☣
Typed directly: ☣
How It Works
1. Hex:U+2623 → ☣ in HTML. The browser turns it into ☣.
2. Decimal: same code point as 9763 → ☣. Same result as hex.
3. CSS: use \2623 in content (not an HTML entity). #point::after appends that ☣ after the paragraph text.
4. Typed ☣: fine in UTF-8 source. All four lines show the same glyph.
Pitfalls & Tips
Common mistakes when working with biohazard sign (☣).
Named
No &name; form
U+2623 has no standard named entity — use ☣ or ☣.
☢
Not radioactive
For radiation hazard use ☢ (U+2622) — a different code point.
a11y
Always add text
Screen readers may not say “biohazard.” Pair the glyph with clear wording on real safety UI.
Emoji
Text vs emoji style
Some platforms draw ☣ as emoji-colored. Use a text-style font when you need a plain symbol.
CSS vs HTML
Do not mix escapes
\2623 belongs in CSS. ☣ / ☣ belong in HTML.
Semicolon
End references
Always finish with ; — write ☣, not ☣.
Compatibility
Browser Support
Biohazard sign (U+2623) and its entity forms (☣, ☣, CSS \\2623) are supported in all mainstream browsers. Glyph style may vary (text vs emoji).
✓ Universal support
Biohazard Sign (☣)
Type ☣, or encode with hex, decimal, or CSS escape — same code point everywhere encoding is supported.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+2623 / entitiesFull support
Bottom line: Prefer a typed ☣ or ☣ with a text label. Use decimal when generating markup, and \\2623 only inside CSS content.
Remember
Key Takeaways
Unicode: biohazard sign is U+2623 (decimal 9763).
HTML: use ☣ or ☣ (no named entity).
CSS: use \2623 inside content for generated icons.
Watch out: ☣ ≠ ☢ (biohazard ≠ radioactive).
One line:U+2623 → ☣ / ☣ / CSS \2623.
Frequently Asked Questions
Use ☣ (hex), ☣ (decimal), or the CSS escape \2623 in the content property. All render ☣. You can also paste ☣ directly if your file is UTF-8. There is no standard named entity.
U+2623 (hex 2623, decimal 9763). Unicode names it BIOHAZARD SIGN. It belongs to the Miscellaneous Symbols block.
No. HTML5 / WHATWG does not define a named character reference for U+2623. Prefer ☣, ☣, or a typed ☣ in UTF-8.
☣ (U+2623) is biohazard (biological risk). ☢ (U+2622) is radioactive. They are different code points — do not swap them on safety labels.
HTML entities (☣ or ☣) go in markup. The CSS escape \2623 is used in stylesheets (usually in the content property of ::before/::after). Both render ☣.
In lab safety copy, medical waste notes, and hazard UI that need a biohazard glyph. Always pair it with clear text — the symbol alone is not enough for accessibility or compliance.
🤔
Did you know?
Biohazard sign is Unicode U+2623 (decimal 9763) in the Miscellaneous Symbols block — official name BIOHAZARD SIGN. There is no standard named HTML entity. It marks biological hazard risk. It is not the radioactive sign (U+2622 ☢).
