Green green food colorings which has been approved by the US Food and Drug Administration. Chlorophyll, the E numbers E140 and E141, is the most common green chemical found in nature, and only allowed in certain medicines and cosmetic materials. Quinoline Yellow (E104) is a commonly used coloring in the United Kingdom but is banned in Australia, Japan, Norway and the United States. Green S (E142) is prohibited in many countries, for it is known to cause hyperactivity, asthma, urticaria, and insomnia. To create green sparks, fireworks use barium salts, such as barium chlorate, barium nitrate crystals, or barium chloride, also
Barium iodide to form organobarium compounds. BaI can be reduced with lithium biphenyl, to give a highly active form of barium metal. Like other soluble salts of barium, barium iodide is toxic. Barium iodide Barium iodide is an inorganic compound with the formula BaI. The compound exists as an anhydrous and a hydrate (BaI(HO)), both of which are white solids. When heated, hydrated barium iodide converts to the anhydrous salt. The hydrated form is freely soluble in water, ethanol, and acetone. The structure of the anhydrous form resembles that of lead(II) chloride with each Ba center bound to nine iodide ligands and