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Iodine pentafluoride

Chemical Properties Production Methods
Iodine pentafluoride
Iodine pentafluoride structure
Chemical Name:
Iodine pentafluoride
IF5;Un2495;Iodinefluoride;Iodpentafluorid;Iodine fluoride;Fluorine iodide;Einecs 232-019-7;Pentafluoroiodine;Pentafluoroiodide;Pentalfluoroiodide
Molecular Formula:
Formula Weight:
MOL File:

Iodine pentafluoride Properties

Melting point:
Boiling point:
3,2 g/cm3
yellow liquid
Water Solubility 
reacts violently with H2O [HAW93]
Exposure limits
TLV-TWA 2.5 mg(F)/m3 (ACGIH, MSHA, and OSHA).
CAS DataBase Reference
7783-66-6(CAS DataBase Reference)
EWG's Food Scores
NIST Chemistry Reference
Iodine pentafluoride(7783-66-6)
EPA Substance Registry System
Iodine pentafluoride (7783-66-6)
  • Risk and Safety Statements
Hazard Codes  O
Risk Statements  8-14-34
Safety Statements  7/9-17-36/37/39-45
RIDADR  2495
Hazard Note  Oxidising agent
HazardClass  5.1
PackingGroup  I

Iodine pentafluoride Chemical Properties,Uses,Production

Chemical Properties

Iodine pentafluoride is a pale yellow liquid at room temperature. Its melting point is 8.5~ boiling point is 102~ and liquid density 3.252 g/cm 3. It is a very stable compound and produces little storage hazard. It could be stored in a closed container for a long time. It is the least reactive of the halogen fluorides and classified as a soft fluorinating reagent. It is used as a mildest, selective fluorinating reagent in the fluorination of organic molecules. It adds iodine and fluorine when reacted with unsaturated compounds. The fluorination reaction is easily controlled and losses due to oxidation fragmentation are minimized. The most important industrial use which requires several hundred thousands kilograms is with perfluoro-olefins in the presence of SbF5 which acts as a catalyst. It adds both fluorine and iodine to tetrafluoroethylene and produces a commercially important telomer. It is also used for nucleophilic fluorine-aryl substitution reaction, plasma-free etching of Si, SiO2 and Si3N4 in IF5. Without a plasma the reactivity sequence of the interhalogen gases is of the following order: C1F3>IFs>F2.

Production Methods

Iodine pentafluoride(IF5) is produced by the action of elemental fluorine on iodine which has a low melting point. The reaction is performed either in solvent or heating iodine to maintain its liquid state. In a commercial preparation about one percent iodine is dissolved in IF5 and brought into fluorination chamber where iodine reacts with fluorine and produces more IF5 which is returned to the receiving vessel. Only a small portion of IF5 is withdrawn from the receiving vessel as product, while the major portion of IF5 is used for dissolving more iodine. This process goes on and on until all iodine is converted into IF5.
In another industrial process, iodine is heated above its melting point (113℃) and reacted with elemental fluorine under three atmosphere of pressure. A precaution is taken not to heat iodine above 150℃ to avoid the formation of another product, IF7. Fluorine is added continuously until all iodine has reacted and converted to IF5.

Chemical Properties

Fuming liquid.Attacks glass.

Physical properties

Black crystalline solid; exists in two modifications: stable black needlesknown as alpha form that produces ruby-red color in transmitted light, and alabile, metastable beta modification consisting of black platelets which appearbrownish-red in transmitted light; density of alpha form 3.86 g/cm3at 0°C;density of beta form 3.66 g/cm3at 0°C; alpha form melts at 27.3°C, vapor pressure being 28 torr at 25°C; beta form melts at 13.9°C; liquid iodine monochloride has bromine-like reddishbrown color; liquid density 3.10 g/mL at 29°C;viscosity 1.21 centipoise at 35°C; decomposes around 100°C; supercools belowits melting point; polar solvent; as a liquid it dissolves iodine, ammoniumchloride and alkali metal chlorides; liquid ICl also miscible with carbon tetrachloride, acetic acid and bromine; the solid crystals dissolve in ethanol, ether,acetic acid and carbon disulfide; solid ICl also dissolves in conc. HCl butdecomposes in water or dilute HCl.


Iodine pentafluoride has very limited use. Itfinds application as a mild fluorinating agent.


Mild fluorinating agent.


Iodine monochloride is prepared by the action of liquid or dry chlorine on astoichiometric quantity of solid iodine. Aqueous solutions of ICl are preparedby passing chlorine gas into a suspension of iodine in moderately stronghydrochloric acid:
5I2 + 4HCl + 3Cl2 → 10ICl + 2H2
Alternatively, iodine monochloride may be made by oxidation of iodine withiodic acid in strong hydrochloric acid solution:
2I2 + HIO3 + 2HCl → 2ICl + 3HIO

General Description

A toxic colorless fuming liquid (m.p. 9° C). Decomposed by water to iodine and hydrofluoric acid. Contact with organic materials may cause their ignition. Corrosive to metals and tissue. Prolonged exposure of the container to fire or heat may result in their violent rupturing and rocketing. Prolonged exposure to low concentrations or short term exposure to high concentrations may result in adverse health effects.

Air & Water Reactions

Fumes in air. Reaction with water or water-containing materials is violent, [Mellor 2, Supp. 1:176, 1956].

Reactivity Profile

A powerful oxidizer. Attack glass. Reacts violently with water or strong bases (potassium hydroxide, sodium hydroxide). Pentalfluoroiodide chars and usually ignites organic matter. Contact with boron, silicon, red phosphorus, sulfur, arsenic, antimony, bismuth, molybdenum and tungsten causes incandescence. Contact with potassium or sodium leads to explosions. Causes aluminum (foil, powder) to ignite. Explosive reactions with tetraiodoethylene, diethylaminotrimethylsilane. Violent reactions wilh benzene, dimethyl sulfoxide, tetraiodoethylene [Bretherick, 5th ed., 1995, p. 1434]. IF5 reacts explosively with diethylaminotrimethylsilane even at low temperature. (Oates, G. et al., J. Chem. Soc., Dalton Trans., 1974, 1383).


Dangerous fire risk, reacts violently with water. Toxic by ingestion and inhalation, corrosive to skin and mucous membranes.

Health Hazard

TOXIC; inhalation or contact with vapor, substance, or decomposition products may cause severe injury or death. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause pollution.

Health Hazard

The toxicity data for this compound in thepublished literature are very limited. Iodinepentafluoride is highly corrosive. Contactwith the skin can cause severe burns. Thevapors are highly irritating to the skin, eyes,and mucous membranes.

Fire Hazard

May ignite combustibles (wood, paper, oil, clothing, etc.). React vigorously and/or explosively with water. Produce toxic and/or corrosive substances on contact with water. Flammable/toxic gases may accumulate in tanks and hopper cars. Some may produce flammable hydrogen gas upon contact with metals. Containers may explode when heated. Runoff may create fire or explosion hazard.

Purification Methods

Rogers et al. [J Am Chem Soc 76 4843 1954] removed dissolved iodine from IF5 by agitating with a mixture of dry air and ClF3 in a Fluorothene beaker using a magnetic stirrer. The mixture is transferred to a still, and the more volatile impurities are pumped off as the pressure is reduced below 40mm. The still is gradually heated (kept at 40mm) to remove the ClF3 before IF5 distilled. Stevens [J Org Chem 26 3451 1961] pumped IF5 under vacuum from its cylinder, trapping it at -78o, then allowing it to melt in a stream of dry N2. HARMFUL VAPOURS. [Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I pp 159-160 1963.]

Iodine pentafluoride Preparation Products And Raw materials

Raw materials

Preparation Products

Iodine pentafluoride Suppliers

Global( 57)Suppliers
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career henan chemical co
+86-371-86658258 CHINA 29954 58
Hubei Jusheng Technology Co.,Ltd.
027-59599243 CHINA 28229 58
Hubei xin bonus chemical co. LTD
027-59338440 CHINA 23035 58
Chongqing Chemdad Co., Ltd
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Neostar United (Changzhou) Industrial Co., Ltd.
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Shaanxi Dideu Medichem Co. Ltd
18192503167 +86-29-89586680
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View Lastest Price from Iodine pentafluoride manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2019-07-06 Pentalfluoroiodide
US $1.00 / kg 1 g 99% 100KG career henan chemical co

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