This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+2108 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
The scruple (℈) is a small unit in the apothecaries' system, derived from the old Roman scrupulum (lit.'small pebble') unit (scrupulus/scrupulum).
Representations
System
Representation (click value to copy)
Nº
8456
UTF-8
E2 84 88
UTF-16
21 08
UTF-32
00 00 21 08
URL-Quoted
%E2%84%88
HTML hex reference
℈
Wrong windows-1252 Mojibake
℈
Encoding: GB18030 (hex bytes)
81 36 BC 31
RFC 5137
\u'2108'
Bash and Zsh inside echo -e
\u2108
C and C++
\u2108
C#
\u2108
CSS
\002108
Excel
=UNICHAR(8456)
Go
\u2108
JavaScript
\u2108
Modern JavaScript since ES6
\u{2108}
JSON
\u2108
Java
\u2108
Lua
\u{2108}
Matlab
char(8456)
Perl
"\x{2108}"
PHP
\u{2108}
PostgreSQL
U&'\2108'
PowerShell
`u{2108}
Python
\u2108
Ruby
\u{2108}
Rust
\u{2108}
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