Natriumhypobromit

SODIUM HYPOBROMITE Chemische Eigenschaften,Einsatz,Produktion Methoden

• Chemische Eigenschaften

  Formula weight (NaBrO) 118.91. Yellow crystals, readily soluble in H2O. May be stored at —20°C in a closed weighing vessel for a few days with only slight loss of NaBrO; decomposition, with formation of NaBr and NaBrO3, begins immediately at 0°C and is complete within two days. Analysis after drying for one or two hours on clay at 0°C; about 92% NaBrO·5H2O, 2% NaBr·2H2O, 1% NaBrO3, 5% moisture.

• Synthese

  A 40% sodium hydroxide solution (438 g., 306 ml.) is stirred and cooled to —3°C in a wide-neck, round-bottom flask closed with a three-hole rubber stopper (for a stirrer, dropping funnel and thermometer). Bromine (314 g., 100 ml., 90% of the quantitj theoretically needed for 175 g. of NaOH) is slowly added (1-2 drops per second) with constant stirring. The temperature of the reaction mixture is held between —8 and —3°C. Insufficient cooling results in the formation of NaBrO3; cooling below —8°C should be avoided to prevent slow solidification of the flask contents.
  Br2 + 2 NaOH + 4 H2O = NaBrO ? 5 H2O + NaBr
  

SODIUM HYPOBROMITE Upstream-Materialien And Downstream Produkte

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