Distillation under low heat can remove color (excess bromine) but this is time consuming and there is a danger of bromostyrene polymerization even with added TBC. In aqueous, sodium thiosulphate can react with bromine to produce sodium bromide, which is water clear, but I don't know if this reaction will take place in pure bromostyrene/dibromostyrene. Additionally, since I am later polymerizing the bromostyrene, any additives that will interfere with polymerization will need to be removed. Any comments or ideas on how to 'remove' typical yellow-orange-browm color from bromostyrene/dibromostyrene would be much appreciated.

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    $\begingroup$ Out of curiosity I wonder why you selected the "everyday-chemistry" tag? $\endgroup$
    – Buck Thorn
    Jan 8 at 10:33
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    $\begingroup$ If the organic mixture is treated by sodium thiosulfate to remove $\ce{Br2}$, the created ions bromide and sulfate will remain in the aqueous phase. Practically no thiosulfate will remain in the organic mixture that may interfere with future polymerization. $\endgroup$
    – Maurice
    Jan 8 at 11:11
  • $\begingroup$ I second a thiosulfate/metabisulfite wash $\endgroup$
    – Waylander
    Jan 19 at 14:56


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