Abstract
IN several communications1 we have shown that the generally accepted reactions for the tannins are quite unreliable, with the result that the above-named test was evolved.2 The gold-beater's skin test demonstrates the tanning properties of a substance, and is given only by true tannins. Its application to the following synthetic tannins, prepared according to Enil Fischer,3 digalloyl-glycol, trigalloyl-glycerin, tetragalloyl-erythrol and hexagalloyl-mannitol, shows them to possess no tanning properties whatever. These observations thus extend my objections,4 since further emphasised by Tschitschibabin,5 to Fischer's galloyl-glucose formula of gallotannin.
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NIERENSTEIN, M. Application of the Gold-Beater's Skin Test to Some Synthetic Tannins. Nature 130, 813 (1932). https://doi.org/10.1038/130813a0
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DOI: https://doi.org/10.1038/130813a0
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