Phenolphthalein-in-conc-sulfuric-acid.jpg


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Date 23 May 2007 (according to Exif data)
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Author Benjah-bmm27
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Public domain This work has been released into the public domain by its author, Benjah-bmm27 . This applies worldwide.

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Benjah-bmm27 grants anyone the right to use this work for any purpose , without any conditions, unless such conditions are required by law.

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23 May 2007