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Iodine monochloride

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Iodine monochloride Basic information
Iodine monochloride Chemical Properties
  • Melting point:25-27°C
  • Boiling point:97.4 °C (lit.)
  • Density 3.24 g/mL at 25 °C (lit.)
  • vapor density 5.5 (vs air)
  • Flash point:96-98°C
  • storage temp. 2-8°C
  • solubility acetic acid: soluble(lit.)
  • form Liquid
  • color Red-brown
  • PH<1 (H2O, 20°C)
  • Water Solubility decomposes
  • Sensitive Moisture Sensitive
  • Merck 14,5017
  • BRN 3902972
  • Stability:Stable. Incompatible with organic materials, strong bases, metals. Air, light and moisture sensitive.
  • CAS DataBase Reference7790-99-0(CAS DataBase Reference)
  • NIST Chemistry ReferenceIodine monochloride(7790-99-0)
  • EPA Substance Registry SystemIodine chloride (ICl) (7790-99-0)
Safety Information
MSDS
Iodine monochloride Usage And Synthesis
  • Chemical Propertiesdark red or brown solid and/or liquid
  • Physical propertiesColorless 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.
  • UsesIodine monochloride is used to estimate theiodine values of fats and oils and as a topicalanti-infective (Merck 1996).
  • UsesIn Wijs' solution (iodine monochloride in glacial acetic acid), used to determine iodine values of fats and oils.
  • PreparationIodine 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 DescriptionBlack 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 ReactionsReacts 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 ProfileIodine 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)].
  • HazardToxic by ingestion and inhalation, strong irritant to eyes and skin.
  • Health HazardIodine 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).
  • Health HazardTOXIC; 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 HazardNon-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 MethodsPurify 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.]
Iodine monochloride Preparation Products And Raw materials
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