Hydrogeniodid
HYDROGEN IODIDE · HYDROIODIC ACID · Hydroiodic Acid 55% to 57% Solution · Hydriodic acid, 57 wt.% solution in H2O · Hydriodic · 55-57 wt.% · caswellno482c · Hydrideiodine
Identifikatoren & physikalische Daten
| CAS No. | 10034-85-2 |
|---|---|
| Summenformel | HI |
| Durchschnittliche Molmasse | 127,9124 g/mol |
| Monoisotopische Masse | 127,91229803 g/mol |
| SMILES | I |
| InChIKey | XMBWDFGMSWQBCA-UHFFFAOYSA-N |
| PubChem CID | 24841 |
| ChEBI | CHEBI:24859 |
| EC No. | 233-109-9 |
| DTXSID | DTXSID2044349 |
| Lokaler Name | Hydrogeniodid |
Chemische & physikalische Eigenschaften
| XLogP | 0,9 |
|---|---|
| Polarare Oberfläche (TPSA) | 0 |
| H-Brücken-Donoren | 1 |
| H-Brücken-Akzeptoren | 0 |
| Frei drehbare Bindungen | 0 |
| Schwere Atome | 1 |
| Formalladung | 0 |
| Komplexität | 0 |
| Stoffklassen | Toxic Gases & Vapors -> Acids, InorganicCorrosives |
| SpringerMaterials Properties | phonon wavenumber |
| Geruch | Acrid |
| Dichte | 5.66 g/L at 0 °C5.23 g/L at 25 °CA solution of hydrogen iodide in watermarketed in various concentrations57% HI density: 1.747% HI, density: 1.510% HI, density: 1.1colorless when freshly made, but rapidly turns yellowish or brown on exposure to light and airmiscible with water and alcoholdissolves iodinethe azeotrope (56.9% HI) boils at 127 °Cdensity: 1.70strong, corrosive acidattacks natural rubber0.10 molar solution: pH 1.0 /Hydriodic acid/5.66 @25 °C1.96 g/mL at 20 °C |
| Color/Form | Colorless gasfumes in moist air |
| Löslichkeit | Extremely soluble in water234 g/100 g water at 10 °C900 g/100 g water at 0 °CSolubility in water, g/100ml at 20 °C: 42 (freely soluble)very soluble in H2Osoluble in organic solvents |
| Siedepunkt | -35.1 °C at 760 mm HgBoiling point: -18.9 °C at 2 atm7.3 °C at 5 atm32.0 at 10 atm127.5 °C at 60 atmdecomposed by lightspecific heat: 0.0545 cal/ g °C at 25 °Cforms an azeotrope with water /Hydrogen iodide/-35.5 °C-35.38 °C @760 [mm Hg]127 °C(lit.) |
| Decomposition | WHEN HEATED TO DECOMPOSITION, IT EMITS HIGHLY TOXIC FUMES OF /HYDROGEN IODIDE/./IF/ ... DECOMP IN SIMPLE AQUEOUS SOLN ... FREE IODINE ... LIBERATED. |
| Schmelzpunkt | -50.8 °C-50.8° |
| Dampfdichte | 4.4 (Air = 1)Relative vapor density (air = 1): 4.4 |
| Dampfdruck | 5,938 mm Hg at 25 °CVapor pressure, kPa at 20 °C: 7335940 [mm Hg] @25 °C721.8kPa at 20℃ |
| Food Contact Substances | FCS -> FDA Inventory of Food Contact Substances Listed in 21 CFR |
| Flammpunkt | 126-127°C |
| Lagerbedingungen | 2-8°C |
| Aggregatzustand | colorless or yellow gas |
| pKa (Säurekonstante) | -10(at 25℃) |
| Farbe | Colorless to brown |
| Geruch | Pungent odor |
| pH | 3.01(1 mM solution)2.04(10 mM solution)1.08(100 mM solution) |
| Spezifische Wärmekapazität | Cp(gas): 0.23 J/(g·K), at 25℃ |
| Merck | 14,4776 |
| Henry-Konstante | 2.5×10-1 mol/(m3Pa) at 25℃, Ordóñ (2012) |
| Dielektrizitätskonstante | 3.4(-50℃) |
| Stabilität | Stable. Incompatible with bases, amines. Corrodes steel. May discolour on exposure to air and light. |
| InChI | 1S/HI/h1H |
| InChIKey | XMBWDFGMSWQBCA-UHFFFAOYSA-N |
| SMILES | I |
| CAS Datenbank | 10034-85-2(CAS DataBase Reference) |
| NIST chemische Informationen | Hydrogen iodide(10034-85-2) |
| EPA chemische Informationen | Hydriodic acid (10034-85-2) |
Sicherheit & Vorschriften
| GHS-Einstufung | DangerH314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]P260, P264, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P405, and P501 (click each P-code to see the statement)H280 (46.8%): Contains gas under pressuremay explode if heated [Warning Gases under pressure]P260, P261, P264, P264+P265, P271, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P321, P363, P403+P233, P405, P410+P403, and P501 (click each P-code to see the statement) |
|---|---|
| Hazards Identification | Toxic/poison by inhalation (TIH/PIH) |
| Regulatorische Informationen | Chemical: Hydriodic acidList I Chemical: A chemical specified by regulation that, in addition to legitimate uses, is used in manufacturing a controlled substance in violation of the Act and is important to the manufacture of a controlled substance. (21 eCFR 1310.02)Hydriodic acid is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Hydriodic acid are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 16-01-2020 https://echa.europa.eu/registration-dossier/-/registered-dossier/30179Hydriodic acid: Does not have an individual approval but may be used under an appropriate group standardThe New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.) |
| Weitere Sicherheitsinformationen | IMAP assessments - Hydriodic acid: Environment tier I assessment |
| DOT-Kennzeichnung | CorrosivePoison Gas Corrosive |
| Brandgefahren | Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:Excerpt from ERG Guide 125 [Gases - Toxic and/or Corrosive]:· Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.· Some may burn but none ignite readily. |
Anwendungen & Verwendung
Beschreibung
‘Iodine’ is derived from iodes, a Greek word meaning violet. It is a member of the halide family and hydrogen iodide is considered a strong acid.
Verwenden
Hydriodic acid is used in the manufactureof iodides, as a reducing agent, and indisinfectants and pharmaceuticals.
Herstellung & Synthese
synthetische
Hydrogen iodide is prepared by direct combination of hydrogen and iodinevapor in the presence of platinum catalyst: H2 + I2 → 2HI The compound is produced in commercial scale by reaction of iodine withhydrazine or hydrogen sulfide: 2I2 + N2H4 → 4HI + N2 I2 + H2S → 2HI + S Hydriodic acid may be prepared by dissolving hydrogen iodide gas in water.The acid also may be obtained by electrolysis of iodine solution or by passinghydrogen sulfide into a suspension of iodine in water and boiling to expelexcess sulfide. After boiling, the precipitated sulfur is removed by filtrationthrough fritted glass plate or glass wool. Hydriodic acid in small quantities may be prepared by adding water care-fully to a solid mixture of red phosphorus and iodine. Technical grade hydriodic acid is a 47% HI solution and usually has abrown color due to the presence of free iodine, produced by air oxidation of HI.Hydriodic acid should be stored in the dark to prevent photochemical decom-position, and free from air to prevent oxidation. The addition of 1.5%hypophosphorus acid (H3PO2) prevents oxidative decomposition. Hydriodic acid also is commercially sold at 57% (azeotropic concentration)and 10% aqueous solutions.