This character is a Math 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 mirrored into Asymptotically Equal To. The word that U+22CD forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
The tilde (, also ) is a grapheme ⟨˜⟩ or ⟨~⟩ with a number of uses. The name of the character came into English from Spanish tilde, which in turn came from the Latin titulus, meaning 'title' or 'superscription'. Its primary use is as a diacritic (accent) in combination with a base letter. Its freestanding form is used in modern texts mainly to indicate approximation.
Representations
System
Representation (click value to copy)
Nº
8909
UTF-8
E2 8B 8D
UTF-16
22 CD
UTF-32
00 00 22 CD
URL-Quoted
%E2%8B%8D
HTML hex reference
⋍
Wrong windows-1252 Mojibake
â‹
HTML named entity
⋍
HTML named entity
⋍
Encoding: GB18030 (hex bytes)
81 36 E2 34
LATEX
\backsimeq
RFC 5137
\u'22CD'
Bash and Zsh inside echo -e
\u22CD
C and C++
\u22CD
C#
\u22CD
CSS
\0022CD
Excel
=UNICHAR(8909)
Go
\u22CD
JavaScript
\u22CD
Modern JavaScript since ES6
\u{22cd}
JSON
\u22CD
Java
\u22CD
Lua
\u{22CD}
Matlab
char(8909)
Perl
"\x{22CD}"
PHP
\u{22cd}
PostgreSQL
U&'\22CD'
PowerShell
`u{22CD}
Python
\u22CD
Ruby
\u{22cd}
Rust
\u{22cd}
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