U+25A1 WHITE SQUARE: □ – Unicode

U+25A1 was added to Unicode in version 1.1 (1993). It belongs to the block U+25A0 to U+25FF Geometric Shapes in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Other Symbol and is commonly used, that is, in no specific script. The character is also known as quadrature and alchemical symbol for salt.

The glyph is not a composition. It has a Ambiguous East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. The glyph can, under circumstances, be confused with 1 other glyphs. In text U+25A1 behaves as Ambiguous (Alphabetic or Ideographic) regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.

The CLDR project labels this character “hollow square” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: hollow square.

The Wikipedia has the following information about this codepoint:

Geometric Shapes is a Unicode block of 96 symbols at code point range U+25A0–25FF.

Representations

System	Representation
Nº	9633
UTF-8	E2 96 A1
UTF-16	25 A1
UTF-32	00 00 25 A1
URL-Quoted	%E2%96%A1
HTML-Escape	□
Wrong windows-1252 Mojibake	â¡
HTML-Escape	&Square;
HTML-Escape	&squ;
HTML-Escape	&square;
alias	quadrature
alias	alchemical symbol for salt
Encoding: EUC-KR (hex bytes)	A1 E0
Encoding: JIS0208 (hex bytes)	A2 A2
L^AT_EX	\square
AGL: Latin-5	uni25A1
Adobe Glyph List	H22073
Adobe Glyph List	whitesquare
digraph	OS

Related Characters

Confusables

Ballot Box

Elsewhere

Complete Record

Property	Value
Age	1.1 (1993)
Unicode Name	WHITE SQUARE
Unicode 1 Name	—
Block	Geometric Shapes
General Category	Other Symbol
Script	Common
Bidirectional Category	Other Neutral
Combining Class	Not Reordered
Decomposition Type	None
Decomposition Mapping	White Square
Lowercase	✘
Simple Lowercase Mapping	White Square
Lowercase Mapping	White Square
Uppercase	✘
Simple Uppercase Mapping	White Square
Uppercase Mapping	White Square
Simple Titlecase Mapping	White Square
Titlecase Mapping	White Square
Case Folding	White Square
ASCII Hex Digit	✘
Alphabetic	✘
Bidi Control	✘
Bidi Mirrored	✘
Composition Exclusion	✘
Case Ignorable	✘
Changes When Casefolded	✘
Changes When Casemapped	✘
Changes When NFKC Casefolded	✘
Changes When Lowercased	✘
Changes When Titlecased	✘
Changes When Uppercased	✘
Cased	✘
Full Composition Exclusion	✘
Default Ignorable Code Point	✘
Dash	✘
Deprecated	✘
Diacritic	✘
Emoji Modifier Base	✘
Emoji Component	✘
Emoji Modifier	✘
Emoji Presentation	✘
Emoji	✘
Extender	✘
Extended Pictographic	✘
FC NFKC Closure	White Square
Grapheme Cluster Break	Any
Grapheme Base	✔
Grapheme Extend	✘
Grapheme Link	✘
Hex Digit	✘
Hyphen	✘
ID Continue	✘
ID Start	✘
IDS Binary Operator	✘
IDS Trinary Operator and	✘
Ideographic	✘
Indic Mantra Category	—
Indic Positional Category	NA
Indic Syllabic Category	Other
Jamo Short Name	—
Join Control	✘
Logical Order Exception	✘
Math	✔
Noncharacter Code Point	✘
NFC Quick Check	Yes
NFD Quick Check	Yes
NFKC Casefold	White Square
NFKC Quick Check	Yes
NFKD Quick Check	Yes
Other Alphabetic	✘
Other Default Ignorable Code Point	✘
Other Grapheme Extend	✘
Other ID Continue	✘
Other ID Start	✘
Other Lowercase	✘
Other Math	✔
Other Uppercase	✘
Prepended Concatenation Mark	✘
Pattern Syntax	✔
Pattern White Space	✘
Quotation Mark	✘
Regional Indicator	✘
Radical	✘
Sentence Break	Other
Soft Dotted	✘
Sentence Terminal	✘
Terminal Punctuation	✘
Unified Ideograph	✘
Variation Selector	✘
Word Break	Other
White Space	✘
XID Continue	✘
XID Start	✘
Expands On NFC	✘
Expands On NFD	✘
Expands On NFKC	✘
Expands On NFKD	✘
Bidi Paired Bracket	White Square
Bidi Paired Bracket Type	None
East Asian Width	Ambiguous
Hangul Syllable Type	Not Applicable
ISO 10646 Comment	—
Joining Group	No_Joining_Group
Joining Type	Non Joining
Line Break	Ambiguous (Alphabetic or Ideographic)
Numeric Type	None
Numeric Value	not a number
Simple Case Folding	White Square
Script Extension
Vertical Orientation	U