What 肼 means
It names hydrazine in technical Chinese.
Hydrazine is also called 联氨, and 肼 appears in names for related compounds. A Chinese effort to standardize chemical names in 1932–33 is part of this character's documented history.
It belongs to specialist chemistry, including aerospace propulsion and pharmaceutical work.
Specialist chemistry vocabulary; unexpected in ordinary chat and likely to be read as a technical term.
Don't confuse it with
1Combination ideas
3A chemical group derived from hydrazine and attached within a larger molecule.
The hydrazine compound monomethylhydrazine.
Unsymmetrical dimethylhydrazine, a rocket-propellant term.
Questions people ask
1Why does 肼 show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type 肼
Windows (Word)
Alt+XType 80BC, then Alt+X to get 肼.
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “cjk unified ideograph-80bc”.
Linux
Ctrl+Shift+UType 80bc, then Enter or Space.
HTML
肼CSS
\80BCPinyin
How to type 肼: in a Mandarin Pinyin input method, enter jing and select jǐng (third tone).
Cangjie
In Cangjie, a shape-based Chinese input method, enter BTT for 肼.
Codes and encoding1 code points
HTML decimal
肼
HTML hex
肼
CSS content
content: "\80BC";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E8%82%BC
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.