7790-99-0 Usage
Chemical Properties
dark red or brown solid and/or liquid
Physical properties
Colorless gas; mold-like pungent odor; melting point 6.45°C; sublimes at4.77°C; supercools to a colorless liquid that boils at 4.5°C; liquid density2.8g/mL at 6°C; soluble in water.
Uses
Different sources of media describe the Uses of 7790-99-0 differently. You can refer to the following data:
1. Iodine monochloride is used to estimate theiodine values of fats and oils and as a topicalanti-infective (Merck 1996).
2. For determination of iodine absorption number of fatsIodine monochloride is used as a catalyst in organic synthesis. It is the source of electrophilic iodine in the synthesis of certain aromatic iodides. It is used to determine the iodine value of a substance.
3. In Wijs' solution (iodine monochloride in glacial acetic acid), used to determine iodine values of fats and oils.
Preparation
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
Black crystals or a reddish brown oily liquid with a pungent odor. Melting point 27°C (alpha form) or 14°C (beta form). Corrosive to metals and tissue.
Air & Water Reactions
Reacts with air to form iodine pentaoxide (I2O5), which decomposes into iodine (I2) and oxygen (O2) with heat beginning at 275°C and proceeding rapidly at 350°C. Soluble in water; reacts with water or steam to produce toxic and corrosive fumes [Lewis].
Reactivity Profile
Iodine monochloride is moderately explosive when heated [Lewis]. Reacts with rubber and many organic materials. Enflames (after a period of delay) with aluminum foil [Mellor 2:119(1946-1947)]. Reacts dangerously with other active metals. Reacts vigorously with cadmium sulfide, lead sulfide, silver sulfide, and zinc sulfide [Mellor 2, Supp. 1:502(1956)]. Combines very exothermically with phosphorus trichloride [Mellor 2, Supp. 1:502(1956)]. Forms Iodine pentaoxide in air which reacts explosively when warmed with carbon, sulfur, sugar, resin, or powdered combustible elements [Mellor 8: 841(1946-1947)].
Health Hazard
Different sources of media describe the Health Hazard of 7790-99-0 differently. You can refer to the following data:
1. Iodine monochloride is highly corrosive tothe skin. Contact with the skin causes burns and dark patches. Upon contact, washimmediately with 15-20% HCl. Vapors areirritating to the skin, eyes, and mucous mem branes. The compound is moderate to highlytoxic by an oral route. The lethal dose in ratsis 59 mg/kg (NIOSH 1986).
2. TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Fire Hazard
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
Purification Methods
Purify it by repeated fractional crystallisation from its melt at low temperatures. The black crystals melt to a red-brown liquid. [Cornog & Karges Inorg Synth I 165 1939.]
Check Digit Verification of cas no
The CAS Registry Mumber 7790-99-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,9 and 0 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 7790-99:
(6*7)+(5*7)+(4*9)+(3*0)+(2*9)+(1*9)=140
140 % 10 = 0
So 7790-99-0 is a valid CAS Registry Number.
InChI:InChI=1/ClI/c1-2
7790-99-0Relevant articles and documents
Hoffmann, S. M. A.,Smith, D. J.,Gonzales Urenna, A.,Grice, R.
, p. 99 - 102 (1984)
Swift, E. H.
, p. 894 - 894 (1930)
Cornog, J.,Karges, R. A.
, p. 1882 - 1882 (1932)
Method for preparing hexafluorobutadiene from iodine and chlorine
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Paragraph 0034-0035; 0045-0046; 0056-0057, (2017/08/27)
The invention relates to a method for preparing hexafluorobutadiene from iodine and chlorine. The method comprises the following steps: preparing a metal coordinated ionic liquid solvent, and reacting iodine with chlorine to prepare iodine monochloride; reacting iodine monochloride with chlorotrifluoroethylene in the presence of the metal coordinated ionic liquid solvent to prepare 1,2-dichloro-2-iodo-1,1,2-trifluoroethane; carrying out a reaction on the 1,2-dichloro-2-iodo-1,1,2-trifluoroethane in the presence of the metal coordinated ionic liquid solvent under the catalysis of zinc powder to obtain 1,2,3,4-tetrachloro-1,1,2,3,4,4-hexafluorobutane; and reacting the 1,2,3,4-tetrachloro-1,1,2,3,4,4-hexafluorobutane with zinc powder in the presence of the metal coordinated ionic liquid solvent to generate hexafluorobutadiene.
Stabilizing aqueous solution of iodine chloride by adding sodium chloride
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Page/Page column 3, (2011/02/19)
This invention relates generally to non-ionic X-ray contrast agents. It further relates to the preparation of iodine chloride, a key reagent in the synthesis of non-ionic X-ray contrast agents such as iodixanol and iohexol. In particular, the iodine chloride is produced in a reaction involving iodine, sodium chlorate, and hydrochloric acid as the starting materials. The instant invention relates to a method of stabilizing aqueous iodine chloride solutions by adding about one to about four molar equivalents of sodium chloride relative to sodium chlorate to an aqueous reaction mixture of sodium chlorate, hydrochloric acid, and iodine.
