Page 187 - The Periodic Table Book
P. 187

Uses




          This bromine salt
          was used in the late
          19th century to help                                                              Fire
          patients sleep.                                                                     extinguisher
                                 Bromine chemical test kit                  extinguisher uses a                      The Halogen Group



                                                                                  This fire
                                                                               non-flammable,
                                                                              bromine-rich gas
                                                                             to extinguish fires.



                                                                           This image was created
                                                                            when light reacted with
                                                                                 silver bromide.






                                       The colours on                                                      Photograph negative
                                      this test kit show
                                     how much bromine
                                        is in the water.
                                                         Bromine
                                                       was used as a
                                                        weapon
                                                      in World War I.
                                                                               The fabric used to make
                                                                               this suit contains bromine
                                                                          compounds that make it fireproof.

                                     ANTOINE-JÉRÔME BALARD
            Crusts of  bromine
            salts form along
            the Israeli shoreline.  In 1826, French chemist
                                  Antoine-Jérôme Balard
                                  discovered bromine. He
                                  heated seawater from                                  Fireproof suit
                                  salt marshes, and after
                                  most of the water had
                                  evaporated, he passed
                                  chlorine gas through what
                                  was left. The remaining
                                  liquid turned orange-red:
                                  this was bromine.

                          The Dead Sea Coast




           use of  this element is as a disinfectant to clean   can be used in film photography in which
           water. It works better than chlorine in hot tubs    images are printed using chemicals on
           as chlorine escapes into the air easily from        negatives. Today, bromine is mainly used
           the warm water. The concentration of  bromine   in fireproof material, such as firefighter
           in swimming pools can be regulated using            suits or furnishings, because it doesn’t
           chemical test kits. Bromine compounds               catch fire easily.                                    185





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