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Hydroiodic acid information


Hydroiodic acid
Space-filling model of hydrogen iodide
Space-filling model of hydrogen iodide
Space-filling model of water
Space-filling model of water
The iodide anion
The iodide anion
Space-filling model of the hydronium cation
Space-filling model of the hydronium cation
Names
IUPAC name
Iodane[1]
Other names
Hydronium iodide
Identifiers
CAS Number
  • 10034-85-2 checkY
3D model (JSmol)
  • Interactive image
ChEBI
  • CHEBI:43451 checkY
ChemSpider
  • 23224 checkY
EC Number
  • 233-109-9
PubChem CID
  • 24841
RTECS number
  • MW3760000
UNII
  • 694C0EFT9Q ☒N
InChI
  • InChI=1S/BrH/h1H checkY
    Key: CPELXLSAUQHCOX-UHFFFAOYSA-N checkY
  • InChI=1/BrH/h1H
    Key: CPELXLSAUQHCOX-UHFFFAOYAZ
SMILES
  • I
Properties
Chemical formula
HI(aq)
Molar mass 127.91 g/mol
Appearance colorless liquid
Odor acrid
Density 1.70 g/mL, azeotrope
(57% HI by weight)
Boiling point 127 °C (261 °F; 400 K) 1.03 bar, azeotrope
Solubility in water
Aqueous solution
Acidity (pKa) -9.3
Hazards
GHS labelling:
Pictograms
GHS05: Corrosive
Signal word
Danger
Hazard statements
H314
Precautionary statements
P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazard ACID: Acid
3
0
0
ACID
Flash point Non-flammable
Related compounds
Other anions
Hydrofluoric acid
Hydrochloric acid
Hydrobromic acid
Related compounds
Hydrogen iodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Hydroiodic acid (or hydriodic acid) is a colorless and aqueous solution of hydrogen iodide (HI). It is a strong acid, which is ionized completely in an aqueous solution. Concentrated solutions of hydroiodic acid are usually 48% to 57% HI.[2]

An oxidized solution of hydriodic acid.
  1. ^ Henri A. Favre; Warren H. Powell, eds. (2014). Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013. Cambridge: The Royal Society of Chemistry. p. 131.
  2. ^ Lyday, Phyllis A. (2005). "Iodine and Iodine Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. pp. 382–390. doi:10.1002/14356007.a14_381. ISBN 978-3527306732.

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Hydroiodic acid

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Hydroiodic acid (or hydriodic acid) is a colorless and aqueous solution of hydrogen iodide (HI). It is a strong acid, which is ionized completely in an...

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Hydrogen iodide

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Aqueous solutions of HI are known as hydroiodic acid or hydriodic acid, a strong acid. Hydrogen iodide and hydroiodic acid are, however, different in that...

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Hydrochloric acid

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iodine, and sulfur will bear the name hydrochloric acid, hydroiodic acid, and hydrosulfuric acid; ...) Multhauf 1966, pp. 141–142. Stapleton, Henry E...

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Binary acid

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acid. For example, there is a weak bond between hydrogen and iodine in hydroiodic acid, making it a very strong acid.[citation needed] Binary acids are...

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Mineral acid

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H3BO3 Hydrofluoric acid HF Hydrobromic acid HBr Perchloric acid HClO4 Hydroiodic acid HI Boyd, Claude E. (2020). "Acidity". Water Quality: 215–231. doi:10...

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Acid

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are hydrochloric acid (HCl), hydroiodic acid (HI), hydrobromic acid (HBr), perchloric acid (HClO4), nitric acid (HNO3) and sulfuric acid (H2SO4). In water...

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Aluminium iodide

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hydroxide with hydrogen iodide or hydroiodic acid. Like the related chloride and bromide, AlI 3 is a strong Lewis acid and will absorb water from the atmosphere...

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Ethylenediamine dihydroiodide

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dihydroiodide (EDDI) is a water-soluble salt derived from ethylenediamine and hydroiodic acid. It is a colorless to light yellow crystalline powder. The salt consists...

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Ammonium iodide

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ammonium cation and an iodide anion. It can be prepared by the action of hydroiodic acid on ammonia. It is easily soluble in water, from which it crystallizes...

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Iodine

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solution. Hence hydroiodic acid cannot be concentrated past this point by evaporation of water. Unlike gaseous hydrogen iodide, hydroiodic acid has major industrial...

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Cyclohexane

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cyclohexane samples. In 1867 Marcellin Berthelot reduced benzene with hydroiodic acid at elevated temperatures. In 1870, Adolf von Baeyer repeated the reaction...

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Acid strength

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Acid strength is the tendency of an acid, symbolised by the chemical formula HA{\displaystyle {\ce {HA}}}, to dissociate into a proton, H+{\displaystyle...

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Hypophosphorous acid

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salt [Ni(H2O)6](H2PO2)2. Because hypophosphorous acid can reduce elemental iodine to form hydroiodic acid, which is a reagent effective for reducing ephedrine...

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Hydrobromic acid

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Hydrobromic acid is an aqueous solution of hydrogen bromide. It is a strong acid formed by dissolving the diatomic molecule hydrogen bromide (HBr) in water...

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Catechol

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converts to catechol via hydrolysis of the CH3−O bond as promoted by hydroiodic acid (HI). Like other difunctional benzene derivatives, catechol readily...

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Ethyl iodide

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from dissolved iodine. It may also be prepared by reaction between hydroiodic acid and ethanol distilling off the ethyl iodide. Ethyl iodide should be...

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Hydrogen astatide

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increases in absolute terms, as the halide becomes larger. Whereas hydroiodic acid solutions are stable, the hydronium-astatide solution is clearly less...

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Asparagusic acid

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Diethyl bis(hydroxymethyl)malonate is treated with hydroiodic acid to yield β,β'-diiodoisobutyric acid after decarboxylation and ester hydrolysis (with...

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Silver iodide

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is a mixture of the two principal phases. Dissolution of the AgI in hydroiodic acid, followed by dilution with water precipitates β-AgI. Alternatively...

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Karl Fischer titration

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solution containing a base, which consumes the sulfur trioxide and hydroiodic acid produced. The main compartment of the titration cell contains the anode...

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Anisole

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highly stable, but the methyl group can be removed with strong acids, such as hydroiodic acid or boron trichloride:: 565–566  CH3OC6H5 + HI → HOC6H5 + CH3I...

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Demethylation

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hydrogen iodide sometimes also with acetic acid. The cleavage of ethers by hydrobromic or hydroiodic acid proceeds by protonation of the ether, followed...

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Iodine compounds

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halides, at 295 kJ/mol. Aqueous hydrogen iodide is known as hydroiodic acid, which is a strong acid. Hydrogen iodide is exceptionally soluble in water: one...

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Haloform reaction

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l'instant, ce composé triple [Notes on the hydroiodide of potassium and on hydroiodic acid – hydroiodide of carbon; means of obtaining instantly this compound...

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Reduction of nitro compounds

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nitroaminophenol. Tin(II) chloride Titanium(III) chloride Samarium Hydroiodic acid Metal hydrides are typically not used to reduce aryl nitro compounds...

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Azeotrope tables

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"Vapour-liquid equilibria in ternary systems. V. The system water-formic acid-metaxylene". Recueil des Travaux Chimiques des Pays-Bas. 66 (9): 564–572...

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Ether

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Although ethers resist hydrolysis, they are cleaved by hydrobromic acid and hydroiodic acid. Hydrogen chloride cleaves ethers only slowly. Methyl ethers typically...

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Iodic acid

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Iodic acid is a white water-soluble solid with the chemical formula HIO3. Its robustness contrasts with the instability of chloric acid and bromic acid. Iodic...

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Electrophilic aromatic directing groups

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and why hydroiodic acid (pKa = -10) being much more acidic than hydrofluoric acid (pKa = 3). (That's 1013 times more acidic than hydrofluoric acid) Due to...

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