What is BROMINE?

Atomic weight, 80; sp. gr., 3188 at o degrees C.; boilingpoint, 587 degrees C. Bromine is found in seawater in combination with potassium, sodium, and magnesium, and more abundantly in certain mineral waters and salt springs. The Stassfurt saline deposits of Germany contain it in larger amount in carmllite, from which it is chiefly made. In the manufacture of potassium chloride from rarnallite, there is produced a motherliquor containing about ] per cent, of bromine as magnesiam bromide, and the bromine is obtained from this salt by heating it with superheated steam, on admixture with manganese dioxide and sulphuric acid, or by decomposition with chlorine, the bromine being set free in vaporous state and condensed in cooled stonew are coils. During the recent war France obtained a considerable quantity of bromine from deposits in the salt marshes or lagoons of Tunisia. Bromine is a heavy, mobile liquid of a redbrown colour and strong, unpleasant smell It gives off vapour of the same colour when exposed to the airthat is to say, it is very volatile. At 7″C. it solidifies to a crystalline mass. It is very poisonous, has a strung corrosive action on the skin, and is soluble in water, alcohol, and ether. Bromine is used in the dye industry, in organic synthesis, and the production of bromides. The soluble salts, sodium bromide, potassium bromide, and ammonium bromide are all used in the preparation of certain medicinal sedative mixtures. Hydrobromic Acid or Hydrogen Bromide, corresponding to hydrochloric acid, is produced when a mixture of hydrogen and bri imine vapour is burned or passed over a spiral wire of platinum maintained at a bright red heat. There arc a number of other methods by which it can be produced. It is a colourless gas of pangent odour, which fumes in the air and is very soluble in water, the aqueous solution resembling one of hydrochloric acid in its general chemical behaviour. Bromic Acid is only known in solution, and it forms bromates corresponding to the chlorates by corresponding reactions, potassium biomate having the formula KBr03.

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Definition of  BROMINE