endo1 (Hive Bee)
10-17-03 12:53
No 465173
       Tech grade HBr in GAA turned dark     

Any reason why a Tech grade 33% HBr in GAA from a professional well known supplier would be ummm... black? Can it be stored OK for a few months at room temp? It might have gotten a little warm in storage over the summer.... Is it still useable? 		 
 
 
 
    Rhodium
(Chief Bee)
10-19-03 02:48
No 465509
       Decolorizing suggestion     

I assume that bromine has formed by some kind of oxidation or by UV-irradiation (sunlight). Add some hypophosphorous acid to the solution and stir for a day, and hopefully the color will be gone. Then store the decolorized acid dark and cool.