12029-98-0 Usage
Description
Iodine pentoxide, also known as Diiodine pentoxide, is a white crystalline compound with the chemical formula I2O5. It is hygroscopic, meaning it readily absorbs moisture from the air, and has a density of 4.98 g/cm3. Iodine pentoxide decomposes around 300°C and is highly soluble in water and nitric acid, but insoluble in ethanol, ether, and carbon disulfide. It forms needle-shaped crystals.
Uses
Used in Gas Analysis:
Iodine pentoxide is used as an oxidizing agent for the analysis of carbon monoxide and for CO removal from air. It oxidizes carbon monoxide to carbon dioxide, a reaction known as Ditte's reaction, which proceeds rapidly at 65°C or above but slowly at room temperature.
Used in Respirators:
Iodine pentoxide is used in respirators, preferably in the presence of some H2SO4, to remove carbon monoxide from the air, providing a safer breathing environment.
Used in Oxidation Reactions:
Iodine pentoxide is also used as an oxidizing agent in other oxidation reactions, demonstrating its versatility in various chemical processes.
Preparation
Iodine pentoxide is prepared by dehydration of iodic acid at 240°C.
2HIO3 → I2O5 + H2O
Reactions
Iodine pentoxide is a strong oxidizing agent and reacts with various oxidizable substances. It oxidizes carbon monoxide to carbon dioxide. The reaction is quantitative and used to measure carbon monoxide in the air:
I2O5 + 5CO → I2 + 5CO2
It reacts with hydrogen sulfide, forming sulfur dioxide:
3I2O5 + 5H2S → 3I2 + 5SO2 + 5H2O
Oxidation reaction also occurs with hydrogen chloride, metal hydrides and a number of metal salts. It dissolves in water reacting to form iodic acid:
I2O5 + H2O → 2HIO3
Dissociation into iodine and oxygen commences when heated above 270°C.
Check Digit Verification of cas no
The CAS Registry Mumber 12029-98-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,0,2 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 12029-98:
(7*1)+(6*2)+(5*0)+(4*2)+(3*9)+(2*9)+(1*8)=80
80 % 10 = 0
So 12029-98-0 is a valid CAS Registry Number.
InChI:InChI=1/I2O5/c3-1(4)7-2(5)6
12029-98-0Relevant articles and documents
Maneva, M.,Georgiev, M.
, p. 867 - 872 (1989)
Fluorine-oxygen exchange reactions in IF5, IF7, and IF5O
Christe, Karl O.,Wilson, William W.,Wilson, Richard D.
, p. 904 - 908 (2008/10/08)
When reacted with alkali-metal nitrates, IF5 readily exchanges two fluorine ligands for a doubly bonded oxygen atom. In all cases MIF4O salts (M = Li, K, Cs) and FNO2 are formed as the primary products. The FNO2 byproduct undergoes a fast secondary reaction with MNO3 to yield equimolar amounts of N2O5 and MF. The N2O5 decomposes to N2O4 and 0.5 mol of O2, while the MF, depending on the nature of M, does or does not undergo complexation with the excess of IF5. Pure MIF4O salts, free of MF or MF·nIF5 byproducts, were prepared from MF, I2O5, and IF5 in either CH3CN or IF5 as a solvent. The new compounds LiIF4O, NaIF4O, RbIF4O, and NOIF4O were characterized by vibrational spectroscopy. It was also shown that, contrary to a previous report, FNO2 does not form a stable adduct with IF5 at temperatures as low as -78°C. An excess of IF7 reacts with MNO3 (M = Li, Na) to give MF, FNO2, IF5, and 0.5 mol of O2, but surprisingly no IF5O. With CsNO3, the reaction products are analogous, except for the CsF reacting with both the IF5 product and the excess of IF7 to give CsIF6·2IF5 and CsIF8, respectively. When in the IF7 reaction an excess of LiNO3, is used, the IF5 product undergoes further reaction with LiNO3, as described above. The IF5O molecule was found to be rather unreactive. It does not react with either LiF or CsF at 25 or 60°C or with LiNO3 or CsNO3 at 25°C. At 60°C with LiNO3, it slowly loses oxygen, with the IF5 product reacting to yield LiIF4O, as described above.