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Iodine: History, Applications & Standards

Iodine is a chemical element; it has symbol I and atomic number 53. The heaviest of the stable halogens, it exists at standard conditions as a semi-lustrous, non-metallic solid that melts to form a deep violet liquid at 114 °C (237 °F), and boils to a violet gas at 184 °C (363 °F). The element was discovered by the French chemist Bernard Courtois in 1811…

Language: English [EN]
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Iodine topic overview

The analysis highlights History, Applications and Standards as prominent areas in the source structure around Iodine.

Related topics
363
Source areas
10
Connected nodes
377
Extracted relationships
325
Concept neighborhoods
80
Bridge connections
377

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Chemistry and compounds · 129 topics
Properties · 61 topics
Biological role · 49 topics
Overview · 31 topics
Applications · 29 topics
History · 24 topics
Occurrence and production · 18 topics
Chemical analysis · 11 topics
Precautions · 8 topics
Spectroscopy · 3 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

123I
synth
124I
synth
125I
synth
127I
100%
129I
trace
131I
synth

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

History

Properties

Chemistry and compounds

Occurrence and production

Applications

Spectroscopy

Chemical analysis

Biological role

Precautions

Bibliography

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Iodine connects Entity context

The extracted context around Iodine shows recurring relationship patterns in the source. For example, Iodine → Ampère, Ancient Greek, André-Marie Ampère, Arguments, At, Bernard Courtois, British, Brittany, Charles Bernard Desormes, Clément, Courtois, Davy, December, Desormes, France, French, Gay-Lussac, He, Humphry Davy, Imperial Institut Another extracted example is Iodine → Apart, Both, Br, Cl, However, Humphry Davy, I2Cl, IBr, ICl, ICN, IF, IN3, ISCN, It, IX, Joseph Louis Gay-Lussac, Justus, Liebig, Numerous, The. Use these groups to spot repeated connection types before inspecting the individual relationships.

Iodine

Top relations

related to history · 31
Iodine → Ampère, Ancient Greek, André-Marie Ampère, Arguments, At, Bernard Courtois, British, Brittany, Charles Bernard Desormes, Clément, Courtois, Davy, December, Desormes, France, French, Gay-Lussac, He, Humphry Davy, Imperial Institut
related to Iodine halides · 26
Iodine → Apart, Both, Br, Cl, However, Humphry Davy, I2Cl, IBr, ICl, ICN, IF, IN3, ISCN, It, IX, Joseph Louis Gay-Lussac, Justus, Liebig, Numerous, The
related to Dietary recommendations and intake · 22
Iodine → AI, Authority, Average Requirement, Dietary Reference Values, EAR, EFSA, For, Level, Medicine, Population Reference Intake, PRI, RDA, RDAs, The, The European Food Safety, The Tolerable Upper Intake, These PRIs, This, TUIL, UL
related to Iodine oxides and oxoacids · 21
Iodine → Davy, Gay-Lussac, H5IO6, HIO, HIO2, HIO3, HIO4, I2O4, I2O5, I4O9, IIII, IO, IO2, IO3, IOF3, It, IVO3, More, S2O6F2, The
related to Other binary iodine compounds · 21
Iodine → Ammonia-free NI3, An, As, AsF6, EsI3, For, Given, II, III, Iodides, IV, Other, S2I2, S2I42, Sb2F11, Se2I42, SI2, Sulfur-iodine, These, Until
related to Occurrence and production · 19
Iodine → After, Air, American Anadarko Basin, An, Ca, Chile, Earth's, Examples, HI, In, IO3, Iodide, Oklahoma, Sodium, The, The Japanese Minami Kantō, These, This, Tokyo
related to Biological role · 13
Iodine → All, During, Fifteen, In, It, Lanthanum, NIS, T0a, T1a, T3, T4, The, These
related to Organoiodine compounds · 11
Iodine → As, CHI3, Grignard, Hofmann, One, Organoiodine, PhICl2, The, They, Williamson, Wurtz
related to Properties · 10
Iodine → Astatine, At, At0, Elemental, I2, Kr, Like, Pauling, Similarly, The
related to Isotopes · 8
Iodine → As, Due, Its, Naturally, Radioisotopes, Solar System, Some, The

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

iodide used acid stable chlorine also element compounds halogens hydrogen form bromine among solution reaction carbon known thyroid gas may

Iodine relationships Subject–Predicate–Object triples

TTTA extracted 325 structured relationships around Iodine. Examples in this analysis include Iodine → 123I → synth and Iodine → 127I → 100%. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Iodine123Isynth1.00infobox
Iodine124Isynth1.00infobox
Iodine125Isynth1.00infobox
Iodine127I100%1.00infobox
Iodine129Itrace1.00infobox
Iodine131Isynth1.00infobox
Iodine135Isynth1.00infobox
IodineAppearancelustrous metallic gray solid, black/violet liquid, violet gas1.00infobox
Iodineat T (K)2601.00infobox
IodineAtomic number (Z)531.00infobox
IodineAtomic radiusempirical: 140 pm1.00infobox
IodineBlockp-block1.00infobox
IodineBoiling point(I2) 457.4 K ​(184.3 °C, ​363.7 °F)1.00infobox
IodineBulk modulus7.7 GPa1.00infobox
IodineCAS Number7553-56-21.00infobox
IodineCovalent radius139±3 pm1.00infobox
IodineCritical point819 K, 11.7 MPa1.00infobox
IodineCrystal structure​base-centered orthorhombic (oS8)1.00infobox
IodineDensity (at 20° C)4.944 g/cm31.00infobox
IodineDiscovery and first isolationBernard Courtois (1811)1.00infobox
IodineElectrical resistivity1.3×107 Ω⋅m (at 0 °C)1.00infobox
IodineElectron configuration[Kr] 4d10 5s2 5p51.00infobox
IodineElectronegativityPauling scale: 2.661.00infobox
IodineElectrons per shell2, 8, 18, 18, 71.00infobox
IodineGroupgroup 17 (halogens)1.00infobox
IodineHeat of fusion(I2) 15.52 kJ/mol1.00infobox
IodineHeat of vaporisation(I2) 41.57 kJ/mol1.00infobox
IodineIonisation energies1st: 1008.4 kJ/mol1.00infobox
IodineIonisation energies2nd: 1845.9 kJ/mol1.00infobox
IodineIonisation energies3rd: 3180 kJ/mol1.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around Iodine bring nearby vocabulary together. In this analysis, examples include Iodide, Used and Stable. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Iodine
    • Iodide
    • Used
    • Stable
    • Halogens
    • Chlorine
    • Compounds
    • Bromine
    • Among
    • Form
    • Solution
    • Deficiency
    • Acid
  • iodine
    • Iodide
    • Used
    • Stable
    • Halogens
    • Chlorine
    • Compounds
    • Bromine
    • Among
    • Form
    • Solution
    • Deficiency
    • Acid
  • chemical element
    • Atomic
    • Number
    • Iodides
    • Iodide
    • Hydrogen
    • Potassium
    • Among
    • Halogens
    • Iodine
    • Chlorine
    • Two
    • Stable
  • atomic number
    • Number
    • Element
    • High
    • Halogens
    • Compounds
    • Stable
    • Also
    • Solid
    • Deficiency
    • Fluorine
    • Liquid
    • Potassium
  • halogens
    • Stable
    • Among
    • Bromine
    • Fluorine
    • Chlorine
    • Solid
    • Iodine
    • Compounds
    • Number
    • Bond
    • Liquid
    • Gas
  • iodide
    • Hydrogen
    • Reaction
    • Iodate
    • Potassium
    • Acid
    • Oxidation
    • Used
    • Iodine
    • Give
    • Iodides
    • May
    • Solution
  • iodine deficiency
    • Iodide
    • Used
    • Stable
    • Halogens
    • Chlorine
    • Compounds
    • Bromine
    • Among
    • Form
    • Solution
    • Solid
    • Two
  • organic compounds
    • Reaction
    • Form
    • Number
    • High
    • Halogens
    • Iodide
    • Also
    • Iodine
    • Bond
    • Potassium
    • Carbon
    • I2

Connections between topic areas Semantic bridges

For Iodine, one of the stronger structural bridges in this analysis connects Iodine with Chemistry and compounds. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
IodineChemistry and compounds · splits 248 ⟂ 130
IodineProperties · splits 316 ⟂ 62
IodineBiological role · splits 328 ⟂ 50
IodineOverview · splits 346 ⟂ 32
IodineApplications · splits 348 ⟂ 30
IodineHistory · splits 353 ⟂ 25
IodineOccurrence and production · splits 359 ⟂ 19
IodineChemical analysis · splits 366 ⟂ 12
IodinePrecautions · splits 369 ⟂ 9
IodineSpectroscopy · splits 374 ⟂ 4
IodineBibliography · splits 374 ⟂ 4

Map overview Semantic statistics

Iodine

Nodes378
Edges377
Triples325
Avg. degree1.99
Density0.005291
Components1

Source & methodology

TTTA analyzes the structure around Iodine to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History, Applications & Standards, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Iodine · EN edition · Analysis: TopicsToTalkAbout

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