30ml 15% White Iodine Solution Max Strength Decolourised Clear Solution
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The halogens darken in colour as the group is descended: fluorine is a very pale yellow, chlorine is greenish-yellow, bromine is reddish-brown, and iodine is violet. The iodine molecule, I 2, dissolves in CCl 4 and aliphatic hydrocarbons to give bright violet solutions. In these solvents the absorption band maximum occurs in the 520 – 540nm region and is assigned to a π * to σ * transition. When I 2 reacts with Lewis bases in these solvents a blue shift in I 2 peak is seen and the new peak (230 – 330nm) arises that is due to the formation of adducts, which are referred to as charge-transfer complexes.  Hydrogen iodide [ edit ]
White Iodine Solution - 15% Max Strength - Original 100ml White Iodine Solution - 15% Max Strength - Original
Elemental iodine is slightly soluble in water, with one gram dissolving in 3450mL at 20°C and 1280mL at 50°C; potassium iodide may be added to increase solubility via formation of triiodide ions, among other polyiodides.  Nonpolar solvents such as hexane and carbon tetrachloride provide a higher solubility.  Polar solutions, such as aqueous solutions, are brown, reflecting the role of these solvents as Lewis bases; on the other hand, nonpolar solutions are violet, the color of iodine vapour.  Charge-transfer complexes form when iodine is dissolved in polar solvents, hence changing the colour. Iodine is violet when dissolved in carbon tetrachloride and saturated hydrocarbons but deep brown in alcohols and amines, solvents that form charge-transfer adducts.  I 2• PPh 3 charge-transfer complexes in CH 2Cl 2. From left to right: (1) I 2 dissolved in dichloromethane – no CT complex. (2) A few seconds after excess PPh 3 was added – CT complex is forming. (3) One minute later after excess PPh 3 was added, the CT complex [Ph 3PI] +I − has been formed. (4) Immediately after excess I 2 was added, which contains [Ph 3PI] +[I 3] −.  Place one-two spatulas of the food sample into a test tube or 1 cm 3 if the sample is liquid. Add about 1 cm 3 depth of water to the tube and stir to mix. If you are following a strict vegan diet and do not eat any fish, eggs, cows' milk or other dairy products, then you may want to consider foods fortified with iodine or consider taking an iodine supplement.Aqueous hydrogen iodide is known as hydroiodic acid, which is a strong acid. Hydrogen iodide is exceptionally soluble in water: one litre of water will dissolve 425 litres of hydrogen iodide, and the saturated solution has only four water molecules per molecule of hydrogen iodide.  Commercial so-called "concentrated" hydroiodic acid usually contains 48–57% HI by mass; the solution forms an azeotrope with boiling point 126.7°C at 56.7g HI per 100g solution. Hence hydroiodic acid cannot be concentrated past this point by evaporation of water.  Unlike gaseous hydrogen iodide, hydroiodic acid has major industrial use in the manufacture of acetic acid by the Cativa process.  
Iodine Uses: Benefits, Side Effects, Recommendations, and More
Iodine can also be found in plant foods, such as cereals and grains, but the levels vary depending on the amount of iodine in the soil where the plants are grown. How much iodine do I need?
Unlike hydrogen fluoride, anhydrous liquid hydrogen iodide is difficult to work with as a solvent, because its boiling point is low, it has a small liquid range, its permittivity is low and it does not dissociate appreciably into H 2I + and HI − Iodine helps make thyroid hormones, which help keep cells and the metabolic rate (the speed at which chemical reactions take place in the body) healthy. Good sources of iodine and the various periodate anions. It is the least abundant of the stable halogens, being the sixty-first most abundant element. As the heaviest essential mineral nutrient, iodine is required for the synthesis of thyroid hormones.  Iodine deficiency affects about two billion people and is the leading preventable cause of intellectual disabilities.