Home U+25A0 to U+25FF Geometric Shapes
Glyph for U+25A1
Source: Noto Sans Symbols2


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.


System Representation
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 □
HTML-Escape □
HTML-Escape □
HTML-Escape □
alias quadrature
alias alchemical symbol for salt
Encoding: EUC-KR (hex bytes) A1 E0
Encoding: JIS0208 (hex bytes) A2 A2
LATEX \square
AGL: Latin-5 uni25A1
Adobe Glyph List H22073
Adobe Glyph List whitesquare
digraph OS

Related Characters



Complete Record

Property Value
Age 1.1 (1993)
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 Glyph for U+25A1 White Square
Simple Lowercase Mapping Glyph for U+25A1 White Square
Lowercase Mapping Glyph for U+25A1 White Square
Simple Uppercase Mapping Glyph for U+25A1 White Square
Uppercase Mapping Glyph for U+25A1 White Square
Simple Titlecase Mapping Glyph for U+25A1 White Square
Titlecase Mapping Glyph for U+25A1 White Square
Case Folding Glyph for U+25A1 White Square
ASCII Hex Digit
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
Full Composition Exclusion
Default Ignorable Code Point
Emoji Modifier Base
Emoji Component
Emoji Modifier
Emoji Presentation
Extended Pictographic
FC NFKC Closure Glyph for U+25A1 White Square
Grapheme Cluster Break Any
Grapheme Base
Grapheme Extend
Grapheme Link
Hex Digit
ID Continue
ID Start
IDS Binary Operator
IDS Trinary Operator and
Indic Mantra Category
Indic Positional Category NA
Indic Syllabic Category Other
Jamo Short Name
Join Control
Logical Order Exception
Noncharacter Code Point
NFC Quick Check Yes
NFD Quick Check Yes
NFKC Casefold Glyph for U+25A1 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
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 Glyph for U+25A1 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 Glyph for U+25A1 White Square
Script Extension
Vertical Orientation U