Biohazard Symbol Copy Paste

Copy ☣ in one tap, or pick from 62 rows: radioactive, warning, poison, high voltage, no entry and road signs.

☣Biohazard signU+2623Ready to copy

62 hazard characters and strings. Tap any value to copy it.

62 hazard characters and strings. A character and its name both copy the character. A code copies the code.
Character	Name	Code point	Alt code	HTML	LaTeX
	U+2623. The sign for biological hazards, developed in 1966 by Charles Baldwin, an engineer at the Dow Chemical Company, and presented in the journal Science in 1967. No Alt code and no HTML name: write ☣. In Unicode since version 1.1 (1993), under its heading Warning signs.
	U+2622. The trefoil, first drawn in 1946 at the University of California Radiation Laboratory in Berkeley. It warns of ionizing radiation, which is wider than radioactivity: X-ray machines come under it too. No Alt code and no HTML name: write ☢. In Unicode since version 1.1 (1993).
	U+26A0. An exclamation mark in a triangle, the general sign for a danger that has no sign of its own. It lacks Unicode's Emoji presentation property, so its default drawing is the plain text one. ⚠ in HTML. Added in version 4.0 (2003).
	U+2620. Unicode's alias: poison. Today it warns of danger of death, above all on poisonous substances, and it is the sign of the pirate flag too. ☠ in HTML. In Unicode since version 1.1 (1993).
	U+26A1. Unicode's aliases: thunder, lightning symbol. It has the Emoji presentation property, so its default drawing is the colour one; the text style row asks for plain black. ⚡ in HTML. Added in version 4.0 (2003).
	U+2623 U+FE0F. ☣ followed by U+FE0F, which asks for the emoji drawing. This pair is what the emoji list calls biohazard.
	U+2622 U+FE0F. ☢ followed by U+FE0F, which asks for the emoji drawing. This pair is what the emoji list calls radioactive.
	U+2621. The dangerous bend. The Bourbaki group of mathematicians put it in the margin beside passages where a reader could go badly wrong. It has no Emoji property, so it stays a plain text sign. In Unicode since version 1.1 (1993).
	U+26D4. Unicode files it under Traffic signs from ARIB STD B24, a character set used in Japanese broadcasting. It has the Emoji presentation property. Added in version 5.2 (2009).
	Made of U+2622, U+2623, U+2620 and U+26A0. Radioactive, biohazard, poison and the general warning. None of the four carries a style selector.
	Made of U+26A0, U+FE0F and U+2623. The warning triangle and the biohazard sign, each followed by U+FE0F to ask for the emoji drawing.
	Made of U+26A0, U+FE0F and U+2622. The warning triangle and the radioactive sign, each followed by U+FE0F to ask for the emoji drawing.
	Made of U+26A0, U+FE0F and U+26A1. The warning triangle with U+FE0F, then the high voltage sign, which needs no selector because its default drawing is already the emoji one.
	U+2623 U+FE0E. ☣ followed by U+FE0E, which asks for the plain, one-colour drawing. An app is free to ignore the request.
	U+2622 U+FE0E. ☢ followed by U+FE0E, which asks for the plain, one-colour drawing.
	U+26A0 U+FE0E. ⚠ followed by U+FE0E, which asks for the plain, one-colour drawing.
	U+26A0 U+FE0F. ⚠ followed by U+FE0F, which asks for the emoji drawing. This pair is what the emoji list calls warning.
	U+2620 U+FE0E. ☠ followed by U+FE0E, which asks for the plain, one-colour drawing.
	U+2620 U+FE0F. ☠ followed by U+FE0F, which asks for the emoji drawing.
	U+26A1 U+FE0E. ⚡ followed by U+FE0E. The selector asks for the plain, one-colour drawing in place of the colour one.
	U+26A1 U+FE0F. ⚡ followed by U+FE0F, which asks for the emoji drawing it already has by default.
	U+1F6AB. The ring with a slash. The emoji list calls it prohibited, and Unicode cross-references ⛔. Added in version 6.0 (2010).
	U+1F6B1. Water that is not safe to drink. One of the 13 emoji that Unicode's emoji list files under warning. Added in version 6.0 (2010).
	U+1F6AD. In Unicode's emoji warning group as no smoking. Added in version 6.0 (2010).
	U+1F6B7. In Unicode's emoji warning group. Added in version 6.0 (2010).
	U+1F6B3. In Unicode's emoji warning group. Added in version 6.0 (2010).
	U+1F6AF. In Unicode's emoji warning group as no littering. Added in version 6.0 (2010).
	U+1F4F5. In Unicode's emoji warning group. Added in version 6.0 (2010).
	U+1F51E. In Unicode's emoji warning group, the last of its prohibition signs. Added in version 6.0 (2010).
	U+20E0. A combining mark: Unicode's note says prohibition, and it is meant to draw a slashed ring over the character before it. Whether it closes round a skull or a flame depends on the font, so test it before relying on it.
	U+2757. Unicode's alias: obstacles on the road, ARIB STD B24. The emoji list calls it red exclamation mark. Added in version 5.2 (2009).
	U+1F6A7. The emoji list calls it construction, and Unicode files it under Traffic signs. Added in version 6.0 (2010).
	U+1F6D1. Unicode's alias: stop sign. Its note: may contain text indicating stop. It cross-references ⚠. Added in version 9.0 (2016).
	U+1F6B8. The second emoji of Unicode's warning group, after ⚠. Added in version 6.0 (2010).
	U+26D0. Unicode's alias: icy road. From the Japanese broadcasting set, like the seven rows after it. It has no Emoji property. Added in version 5.2 (2009).
	U+26CC. Unicode's alias: accident. Added in version 5.2 (2009).
	U+26D2. Unicode's alias: road closed. Added in version 5.2 (2009).
	U+26CD. Added in version 5.2 (2009).
	U+26DA. Added in version 5.2 (2009).
	U+26DB. Unicode's alias: drive slow. A triangle standing on its point. Added in version 5.2 (2009).
	U+26D3. Unicode's alias: tyre chains required. It has the Emoji property, and the emoji list calls it chains. Added in version 5.2 (2009).
	U+26D1. Unicode's alias: maintenance. The emoji list calls it rescue worker's helmet. Added in version 5.2 (2009).
	U+1F525. The flame emoji. No Unicode name holds the word flammable, so this is the nearest character to a flammable sign. Added in version 6.0 (2010).
	U+1F4A5. A burst. The emoji list calls it collision. Added in version 6.0 (2010).
	U+1F4A3. Filed by Unicode under Comic style symbols, next to the burst above. Added in version 6.0 (2010).
	U+1F9E8. An emoji since version 11.0 (2018), and the nearest character to a stick of explosive.
	U+1F6A8. Unicode's alias: rotating beacon. The emoji list calls it police car light. Added in version 6.0 (2010).
	U+2607. A plain text bolt that Unicode files under Weather and astrological symbols, in Unicode since version 1.1 (1993). It has no Emoji property.
	U+21AF. Unicode's alias: electrolysis. A zigzag with an arrowhead, in plain text since version 1.1 (1993).
	U+1F480. The skull with no bones, filed by Unicode under Fairy tale symbols. Added in version 6.0 (2010).
	U+1F9A0. Unicode's note: microorganism, intended to cover bacteria, viruses, amoebas, etc. Added in version 11.0 (2018).
	U+269B. Not the radiation warning. Unicode's alias: nuclear installation (on maps). Orbits round a nucleus, where ☢ is three blades round a dot. Added in version 4.1 (2005).
	U+2707. Not a warning sign: a dingbat named for a tape drive. Its ring of three shapes can pass for the trefoil. In Unicode since version 1.1 (1993).
	U+25B3. An empty triangle with no exclamation mark in it. Unicode's alias: trine. &xutri; in HTML, \bigtriangleup in LaTeX.
	U+03DF. Not a bolt: an archaic Greek letter that stands for 90 in Greek numerals. Modern type most often draws it Z-shaped, like a lightning bolt. Added in version 3.0 (1999).
	U+203C. Two exclamation marks in one character, and the only row here with an Alt code: Alt+19. It has the Emoji property. In Unicode since version 1.1 (1993).
	U+1F571. A second skull and crossbones, added in version 7.0 (2014). Unicode cross-references ☠. It has no Emoji property.
	U+1F6C7. The plain text partner of 🚫, added in version 7.0 (2014). No Emoji property.
	U+1F5F2. Unicode's alias: lightning bolt. It cross-references ⚡. Added in Unicode 7.0 (2014), with no Emoji property.
	U+2BC3. A filled octagon with no word on it, which Unicode cross-references from the stop sign. Added in version 7.0 (2014).
	U+1CC61. One of four atomic bombs among the game sprites of the Symbols for Legacy Computing Supplement block, added in version 16.0 (2024).
	U+1CE02. From the terminal graphics of the same block, added in version 16.0 (2024).

Next step More signs to paste beside it

How it works

The biohazard symbol is ☣, Biohazard sign, U+2623, and the radioactive symbol ☢ is row two, with ⚠, ☠ and ⚡ under them. The 62 rows also hold text and emoji styles, prohibition signs, road warnings and look-alikes.

Read the full guide

Black sign or colour emoji

☣, ☢, ⚠ and ☠ are text characters that also have Unicode's Emoji property, so an app may draw them in black or in colour. A row that ends in U+FE0E asks for the plain drawing and one that ends in U+FE0F asks for the emoji. None has an HTML name: ☣ is ☣ and ☢ is ☢.

Tips

☢ is the radiation warning. ⚛, Atom symbol, carries Unicode's alias nuclear installation, a map sign. Pick the row by name, not by eye.
⚡ defaults to the colour drawing. For a black bolt, copy its text style row or ☇, Lightning, which has no emoji form.

Questions and answers

How do I type the biohazard symbol on a keyboard?

It has no Alt code and no key on the U.S. layout. In Word, type 2623, then press Alt and X. On a Mac, press Fn or Globe with E and search the viewer that opens. Anywhere else, copy it from this page.

What does the radioactive symbol ☢ stand for?

☢, Radioactive sign, U+2622, stands for ionizing radiation, which covers X-ray machines as well as radioactive material. The trefoil was first drawn in 1946 at the University of California Radiation Laboratory in Berkeley. ☢️ is its emoji style.

What does the biohazard symbol mean?

It marks a biological hazard. Charles Baldwin of the Dow Chemical Company developed it in 1966. His team wanted a shape that was memorable but meant nothing yet, so people could be taught its meaning. The journal Science presented it in 1967.

Why is ☣ black in one app and in colour in another?

☣ has the Emoji property but not Emoji presentation, so its default drawing is the text one, and apps differ. Copy the row ending in U+FE0F to ask for the emoji, or the one ending in U+FE0E for plain black. An app may ignore either.

Is ☠ the poison symbol?

Yes. Unicode gives ☠, Skull and crossbones, U+2620, the alias poison, and it is used as a warning of danger of death, above all on poisonous substances. 💀 is a different character, Skull, with no alias and no bones.

All 62 hazard characters and strings

Start here 10

Biohazard sign U+2623. The sign for biological hazards, developed in 1966 by Charles Baldwin, an engineer at the Dow Chemical Company, and presented in the journal Science in 1967. No Alt code and no HTML name: write ☣. In Unicode since version 1.1 (1993), under its heading Warning signs.
Biohazard sign, emoji style U+2623 U+FE0F. ☣ followed by U+FE0F, which asks for the emoji drawing. This pair is what the emoji list calls biohazard.
Caution sign U+2621. The dangerous bend. The Bourbaki group of mathematicians put it in the margin beside passages where a reader could go badly wrong. It has no Emoji property, so it stays a plain text sign. In Unicode since version 1.1 (1993).
Four warning signs in one copy Made of U+2622, U+2623, U+2620 and U+26A0. Radioactive, biohazard, poison and the general warning. None of the four carries a style selector.
High voltage sign U+26A1. Unicode's aliases: thunder, lightning symbol. It has the Emoji presentation property, so its default drawing is the colour one; the text style row asks for plain black. ⚡ in HTML. Added in version 4.0 (2003).

Show all 62 hazard characters and strings (57 more)

Start here, continued

No entry U+26D4. Unicode files it under Traffic signs from ARIB STD B24, a character set used in Japanese broadcasting. It has the Emoji presentation property. Added in version 5.2 (2009).
Radioactive sign U+2622. The trefoil, first drawn in 1946 at the University of California Radiation Laboratory in Berkeley. It warns of ionizing radiation, which is wider than radioactivity: X-ray machines come under it too. No Alt code and no HTML name: write ☢. In Unicode since version 1.1 (1993).
Radioactive sign, emoji style U+2622 U+FE0F. ☢ followed by U+FE0F, which asks for the emoji drawing. This pair is what the emoji list calls radioactive.
Skull and crossbones U+2620. Unicode's alias: poison. Today it warns of danger of death, above all on poisonous substances, and it is the sign of the pirate flag too. ☠ in HTML. In Unicode since version 1.1 (1993).
Warning sign U+26A0. An exclamation mark in a triangle, the general sign for a danger that has no sign of its own. It lacks Unicode's Emoji presentation property, so its default drawing is the plain text one. ⚠ in HTML. Added in version 4.0 (2003).

Warning signs 3

Warning and biohazard, emoji style Made of U+26A0, U+FE0F and U+2623. The warning triangle and the biohazard sign, each followed by U+FE0F to ask for the emoji drawing.
Warning and high voltage, emoji style Made of U+26A0, U+FE0F and U+26A1. The warning triangle with U+FE0F, then the high voltage sign, which needs no selector because its default drawing is already the emoji one.
Warning and radioactive, emoji style Made of U+26A0, U+FE0F and U+2622. The warning triangle and the radioactive sign, each followed by U+FE0F to ask for the emoji drawing.

Text style and emoji style 8

Biohazard sign, text style U+2623 U+FE0E. ☣ followed by U+FE0E, which asks for the plain, one-colour drawing. An app is free to ignore the request.
High voltage sign, emoji style U+26A1 U+FE0F. ⚡ followed by U+FE0F, which asks for the emoji drawing it already has by default.
High voltage sign, text style U+26A1 U+FE0E. ⚡ followed by U+FE0E. The selector asks for the plain, one-colour drawing in place of the colour one.
Radioactive sign, text style U+2622 U+FE0E. ☢ followed by U+FE0E, which asks for the plain, one-colour drawing.
Skull and crossbones, emoji style U+2620 U+FE0F. ☠ followed by U+FE0F, which asks for the emoji drawing.
Skull and crossbones, text style U+2620 U+FE0E. ☠ followed by U+FE0E, which asks for the plain, one-colour drawing.
Warning sign, emoji style U+26A0 U+FE0F. ⚠ followed by U+FE0F, which asks for the emoji drawing. This pair is what the emoji list calls warning.
Warning sign, text style U+26A0 U+FE0E. ⚠ followed by U+FE0E, which asks for the plain, one-colour drawing.

No entry and prohibited 11

Combining enclosing circle backslash U+20E0. A combining mark: Unicode's note says prohibition, and it is meant to draw a slashed ring over the character before it. Whether it closes round a skull or a flame depends on the font, so test it before relying on it.
Do not litter symbol U+1F6AF. In Unicode's emoji warning group as no littering. Added in version 6.0 (2010).
No bicycles U+1F6B3. In Unicode's emoji warning group. Added in version 6.0 (2010).
No entry sign U+1F6AB. The ring with a slash. The emoji list calls it prohibited, and Unicode cross-references ⛔. Added in version 6.0 (2010).
No mobile phones U+1F4F5. In Unicode's emoji warning group. Added in version 6.0 (2010).
No one under eighteen symbol U+1F51E. In Unicode's emoji warning group, the last of its prohibition signs. Added in version 6.0 (2010).
No pedestrians U+1F6B7. In Unicode's emoji warning group. Added in version 6.0 (2010).
No smoking symbol U+1F6AD. In Unicode's emoji warning group as no smoking. Added in version 6.0 (2010).
Non-potable water symbol U+1F6B1. Water that is not safe to drink. One of the 13 emoji that Unicode's emoji list files under warning. Added in version 6.0 (2010).
Octagonal sign U+1F6D1. Unicode's alias: stop sign. Its note: may contain text indicating stop. It cross-references ⚠. Added in version 9.0 (2016).
Prohibited sign U+1F6C7. The plain text partner of 🚫, added in version 7.0 (2014). No Emoji property.

Road warnings 11

Car sliding U+26D0. Unicode's alias: icy road. From the Japanese broadcasting set, like the seven rows after it. It has no Emoji property. Added in version 5.2 (2009).
Chains U+26D3. Unicode's alias: tyre chains required. It has the Emoji property, and the emoji list calls it chains. Added in version 5.2 (2009).
Children crossing U+1F6B8. The second emoji of Unicode's warning group, after ⚠. Added in version 6.0 (2010).
Circled crossing lanes U+26D2. Unicode's alias: road closed. Added in version 5.2 (2009).
Construction sign U+1F6A7. The emoji list calls it construction, and Unicode files it under Traffic signs. Added in version 6.0 (2010).
Crossing lanes U+26CC. Unicode's alias: accident. Added in version 5.2 (2009).
Disabled car U+26CD. Added in version 5.2 (2009).
Drive slow sign U+26DA. Added in version 5.2 (2009).
Heavy exclamation mark symbol U+2757. Unicode's alias: obstacles on the road, ARIB STD B24. The emoji list calls it red exclamation mark. Added in version 5.2 (2009).
Heavy white down-pointing triangle U+26DB. Unicode's alias: drive slow. A triangle standing on its point. Added in version 5.2 (2009).
Helmet with white cross U+26D1. Unicode's alias: maintenance. The emoji list calls it rescue worker's helmet. Added in version 5.2 (2009).

Fire, blast and shock 10

Bomb U+1F4A3. Filed by Unicode under Comic style symbols, next to the burst above. Added in version 6.0 (2010).
Collision symbol U+1F4A5. A burst. The emoji list calls it collision. Added in version 6.0 (2010).
Downwards zigzag arrow U+21AF. Unicode's alias: electrolysis. A zigzag with an arrowhead, in plain text since version 1.1 (1993).
Explosion at horizon U+1CE02. From the terminal graphics of the same block, added in version 16.0 (2024).
Fire U+1F525. The flame emoji. No Unicode name holds the word flammable, so this is the nearest character to a flammable sign. Added in version 6.0 (2010).
Firecracker U+1F9E8. An emoji since version 11.0 (2018), and the nearest character to a stick of explosive.
Lightning U+2607. A plain text bolt that Unicode files under Weather and astrological symbols, in Unicode since version 1.1 (1993). It has no Emoji property.
Lightning mood U+1F5F2. Unicode's alias: lightning bolt. It cross-references ⚡. Added in Unicode 7.0 (2014), with no Emoji property.
Police cars revolving light U+1F6A8. Unicode's alias: rotating beacon. The emoji list calls it police car light. Added in version 6.0 (2010).
Up-pointing atomic bomb U+1CC61. One of four atomic bombs among the game sprites of the Symbols for Legacy Computing Supplement block, added in version 16.0 (2024).

Skulls, germs and atoms 4

Atom symbol U+269B. Not the radiation warning. Unicode's alias: nuclear installation (on maps). Orbits round a nucleus, where ☢ is three blades round a dot. Added in version 4.1 (2005).
Black skull and crossbones U+1F571. A second skull and crossbones, added in version 7.0 (2014). Unicode cross-references ☠. It has no Emoji property.
Microbe U+1F9A0. Unicode's note: microorganism, intended to cover bacteria, viruses, amoebas, etc. Added in version 11.0 (2018).
Skull U+1F480. The skull with no bones, filed by Unicode under Fairy tale symbols. Added in version 6.0 (2010).

Look-alikes 5

Double exclamation mark U+203C. Two exclamation marks in one character, and the only row here with an Alt code: Alt+19. It has the Emoji property. In Unicode since version 1.1 (1993).
Greek small letter koppa U+03DF. Not a bolt: an archaic Greek letter that stands for 90 in Greek numerals. Modern type most often draws it Z-shaped, like a lightning bolt. Added in version 3.0 (1999).
Horizontal black octagon U+2BC3. A filled octagon with no word on it, which Unicode cross-references from the stop sign. Added in version 7.0 (2014).
Tape drive U+2707. Not a warning sign: a dingbat named for a tape drive. Its ring of three shapes can pass for the trefoil. In Unicode since version 1.1 (1993).
White up-pointing triangle U+25B3. An empty triangle with no exclamation mark in it. Unicode's alias: trine. &xutri; in HTML, \bigtriangleup in LaTeX.

How this list was compiled: Names, and the code points they belong to, are checked against UnicodeData.txt, version 18.0.0 (https://www.unicode.org/Public/18.0.0/ucd/UnicodeData.txt, checked 2026-09-19), and printed in sentence case. Notes that say Unicode's note, Unicode's alias, Unicode files it or cross-references quote the headings, aliases, notes and cross-references of NamesList.txt of the same version (https://www.unicode.org/Public/18.0.0/ucd/NamesList.txt); the version a character was added in is from DerivedAge.txt (https://www.unicode.org/Public/18.0.0/ucd/DerivedAge.txt), block names are from Blocks.txt, the Emoji property and the text style and emoji style sequences are from https://www.unicode.org/Public/18.0.0/ucd/emoji/emoji-data.txt and emoji-variation-sequences.txt, emoji names are from https://www.unicode.org/Public/18.0.0/emoji/emoji-test.txt, and the years are from https://www.unicode.org/history/publicationdates.html. Alt codes are from the code page 437 table (https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/PC/CP437.TXT), the PC graphics table for codes 1 to 31 (https://www.unicode.org/Public/MAPPINGS/VENDORS/MISC/IBMGRAPH.TXT) and the code page 1252 table (https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP1252.TXT). HTML entity names are from https://html.spec.whatwg.org/entities.json, the HTML 4 name first where there is one, else the shortest. LaTeX macros are listed only when LaTeX's own fontdef.dtx or ltoutenc.dtx (https://github.com/latex3/latex2e/tree/develop/base) or the amssymb and amsfonts sources (https://mirrors.ctan.org/fonts/amsfonts/source/) define them, matched to a code point through unicode-math-table.tex (https://github.com/latex3/unicode-math). The 13 emoji of the warning group are the fully-qualified entries under subgroup: warning in emoji-test.txt, version 18.0 (https://www.unicode.org/Public/18.0.0/emoji/emoji-test.txt); the names the emoji list uses (biohazard, radioactive, warning, prohibited, red exclamation mark, construction, collision, police car light, chains, rescue worker's helmet) are from the same file, and the Emoji presentation property is from emoji-data.txt. What the signs mean, as the articles record it: the biohazard sign developed in 1966 by Charles Baldwin of the Dow Chemical Company and presented in Science in 1967, the trefoil drawn in 1946 at the University of California Radiation Laboratory in Berkeley and standing for ionizing radiation, the exclamation mark in a triangle as the generic warning, and the skull and crossbones as a warning of danger of death, particularly on poisons, and on pirate flags, https://en.wikipedia.org/wiki/Hazard_symbol; the caution sign as the dangerous bend of the Bourbaki group, https://en.wikipedia.org/wiki/Bourbaki_dangerous_bend_symbol; ARIB STD-B24 as a character set used in Japanese broadcasting, https://en.wikipedia.org/wiki/ARIB_STD_B24_character_set; koppa as the numeral 90 is Unicode's own note. Notes on how a character is drawn describe one browser render on 2026-09-19; other fonts draw it differently. The last group holds characters that one ordinary computer had no font for on the day this list was checked; your device may differ. What is listed: the four characters under Unicode's heading Warning signs, the warning and high voltage signs, their text style and emoji style sequences, all 13 emoji of Unicode's warning group, the road warnings of the Japanese broadcasting set, fire, blast and shock characters, skulls, the microbe and the atom, labelled look-alikes, six characters that may draw as empty boxes, and this site's own strings of four characters or fewer. Left out: medical and alchemical signs (they have their own pages), weather lightning clouds, and every coloured circle or square. The Start here group, the made rows and the order are this site's own choice. All sources were checked on 2026-09-19. How modern type draws the numeral koppa: https://en.wikipedia.org/wiki/Koppa, checked 2026-09-20. Licence: own work (facts from the Unicode Character Database, Unicode License v3, and from Wikipedia, CC BY-SA 4.0, restated in our own words; aliases and notes marked as Unicode's are quoted from NamesList.txt, Copyright © 1991-2026 Unicode, Inc., https://www.unicode.org/license.txt)