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 is written as end of a European number, e.g., a currency symbol, from left to right. When changing direction it is not mirrored. The word that U+212E 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 estimated sign, ℮, also referred to as the e-mark or estimated quantity (French: quantité estimée) can be found on most prepackaged products in the European Union (EU). Its use indicates that the prepackage fulfils EU Directive 76/211/EEC, which specifies the maximum permitted tolerances in package content.
The shape and dimensions of the e-mark are defined in EU Directive 2009/34/EC. The e-mark is also used on prepackages in the United Kingdom, Australia and South Africa.
Representations
System
Representation (click value to copy)
Nº
8494
UTF-8
E2 84 AE
UTF-16
21 2E
UTF-32
00 00 21 2E
URL-Quoted
%E2%84%AE
HTML hex reference
℮
Wrong windows-1252 Mojibake
â„®
Encoding: GB18030 (hex bytes)
81 36 BF 36
AGL: Latin-2
estimated
AGL: Latin-3
estimated
AGL: Latin-4
estimated
AGL: Latin-5
estimated
Adobe Glyph List
estimated
RFC 5137
\u'212E'
Bash and Zsh inside echo -e
\u212E
C and C++
\u212E
C#
\u212E
CSS
\00212E
Excel
=UNICHAR(8494)
Go
\u212E
JavaScript
\u212E
Modern JavaScript since ES6
\u{212e}
JSON
\u212E
Java
\u212E
Lua
\u{212E}
Matlab
char(8494)
Perl
"\x{212E}"
PHP
\u{212e}
PostgreSQL
U&'\212E'
PowerShell
`u{212E}
Python
\u212E
Ruby
\u{212e}
Rust
\u{212e}
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