Jump to content
 







Main menu
    


Navigation  


●Main page
 ●Contents
 ●Current events
 ●Random article
 ●About Wikipedia
 ●Contact us
 ●Donate
  



Contribute  


●Help
 ●Learn to edit
 ●Community portal
 ●Recent changes
 ●Upload file
  







Search  

































●Create account

●Log in
 









●Create account
 ● Log in
  



Pages for logged out editors learn more  


●Contributions
 ●Talk
  


















Contents

   



(Top)
  


1 Reactions  


1.1  Cativa process  




1.2  Illicit uses  






2 References  




3 External links  













Hydroiodic acid






●العربية
 ●تۆرکجه
 ●বাংলা
 ●Català
 ●Čeština
 ●Cymraeg
 ●Deutsch
 ●Eesti
 ●Esperanto
 ●فارسی
 ●Français
 ●हिन्दी
 ●Bahasa Indonesia
 ●Italiano
 ●Latviešu
 ●Македонски
 ●മലയാളം
 ●Bahasa Melayu
 ●Nederlands
 ●日本語
 ●Nordfriisk
 ●Occitan
 ●Oʻzbekcha / ўзбекча
 ●Polski
 ●Română
 ●Русский
 ●Slovenčina
 ●ไทย
 ●Українська
 ●Tiếng Việt
 ●中文
  
Edit links
  








●Article
 ●Talk
  
















●Read
 ●Edit
 ●View history
  







Tools
    


Actions  


●Read
 ●Edit
 ●View history
  



General  


●What links here
 ●Related changes
 ●Upload file
 ●Special pages
 ●Permanent link
 ●Page information
 ●Cite this page
 ●Get shortened URL
 ●Download QR code
 ●Wikidata item
  



Print/export  


●Download as PDF
 ●Printable version
  















Appearance
    

 





From Wikipedia, the free encyclopedia
  

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
Other names
  • Aqueous hydrogen iodide
  • Hydriodic acid
  • Hydrogen iodide, hydrous
  • Hydronium iodide
    • Identifiers

    CAS Number

    3D model (JSmol)
    ChEBI
    ChemSpider
    EC Number
    • 233-109-9

    PubChem CID
    RTECS number
    • MW3760000
    UNII

    • InChI=1S/BrH/h1H checkY

      Key: CPELXLSAUQHCOX-UHFFFAOYSA-N checkY

    • InChI=1/BrH/h1H

      Key: CPELXLSAUQHCOX-UHFFFAOYAZ

    • [OH3+].[I-]

    Properties

    Chemical formula

    		 HI(aq)
    Molar mass 127.912 g·mol−1 (HI)
    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 (HI)[1]
    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
  • 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 (orhydriodic acid) is a colorless liquid. It is an aqueous solutionofhydrogen iodide with the chemical formula HI(aq). It is a strong acid, in which hydrogen iodide is ionized completely in an aqueous solution. Concentrated aqueous solutions of hydrogen iodide are usually 48% to 57% HI by mass.[2]

    An oxidized solution of hydriodic acid.

    Reactions

    [edit]

    Hydroiodic acid reacts with oxygen in air to give iodine:

    4 HI(aq) + O2 → 2 H2O + 2 I2

    Like hydrogen halides, hydroiodic acid adds to alkenes to give alkyl iodides. It can also be used as a reducing agent, for example in the reduction of aromatic nitro compoundstoanilines.[3]

    Cativa process

    [edit]

    The Cativa process is a major end use of hydroiodic acid, which serves as a co-catalyst for the production of acetic acid by the carbonylationofmethanol.[4][5]

    The catalytic cycle of the Cativa process
    The catalytic cycle of the Cativa process

    Illicit uses

    [edit]

    Hydroiodic acid is listed as a U.S. Federal DEA List I Chemical, owing to its use as a reducing agent related to the production of methamphetamine from ephedrineorpseudoephedrine (recovered from nasal decongestant pills).[6]

    References

    [edit]
    1. ^ Perrin, D. D., ed. (1982) [1969]. Ionisation Constants of Inorganic Acids and Bases in Aqueous Solution. IUPAC Chemical Data (2nd ed.). Oxford: Pergamon (published 1984). Entry 32. ISBN 0-08-029214-3. LCCN 82-16524.
  • ^ 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.
  • ^ Kumar, J. S. Dileep; Ho, ManKit M.; Toyokuni, Tatsushi (2001). "Simple and chemoselective reduction of aromatic nitro compounds to aromatic amines: reduction with hydriodic acid revisited". Tetrahedron Letters. 42 (33): 5601–5603. doi:10.1016/s0040-4039(01)01083-8.
  • ^ Jones, J. H. (2000). "The Cativa Process for the Manufacture of Acetic Acid" (PDF). Platinum Metals Rev. 44 (3): 94–105.
  • ^ Sunley, G. J.; Watson, D. J. (2000). "High productivity methanol carbonylation catalysis using iridium - The Cativa process for the manufacture of acetic acid". Catalysis Today. 58 (4): 293–307. doi:10.1016/S0920-5861(00)00263-7.
  • ^ Skinner, Harry F. (1990). "Methamphetamine synthesis via hydriodic acid/Red phosphorus reduction of ephedrine". Forensic Science International. 48 (2): 123–134. doi:10.1016/0379-0738(90)90104-7.
    • [edit]

    Retrieved from "https://en.wikipedia.org/w/index.php?title=Hydroiodic_acid&oldid=1232673676"
    Categories: 
    ●Iodides
     ●Acids
     ●Nonmetal halides
     ●Reducing agents
     Hidden categories: 
    ●Articles with short description
     ●Short description is different from Wikidata
     ●Articles without KEGG source
     ●Articles with changed FDA identifier
     ●Chembox having GHS data
     ●Articles containing unverified chemical infoboxes
     ●Chembox image size set
     ●Articles with J9U identifiers
     ●Articles with LCCN identifiers
      


    ●This page was last edited on 5 July 2024, at 00:32 (UTC).
    ●Text is available under the Creative Commons Attribution-ShareAlike License 4.0; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.


    ●Privacy policy
    ●About Wikipedia
    ●Disclaimers
    ●Contact Wikipedia
    ●Code of Conduct
    ●Developers
    ●Statistics
    ●Cookie statement
    ●Mobile view


    Wikimedia Foundation
    Powered by MediaWiki