Abstract
DURING an investigation of ox-liver sulphatase A 1,2 it became apparent that the substrate, nitrocatechol sulphate, was impure. As this was prepared by persulphate oxidation of p-nitrophenol3,4 it seemed that a likely contaminant might be nitropyrogallol disulphate, formed by the oxidation of the phenol in both ortho positions.
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ROY, A., KERR, L. Occurrence of Nitropyrogallol Disulphate in Preparations of Nitrocatechol Sulphate. Nature 178, 376 (1956). https://doi.org/10.1038/178376a0
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DOI: https://doi.org/10.1038/178376a0
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