The degradation of wool by fifty volumes of 0.0100 to 0.0400 M potassium permanganate, by fifty volumes of 0.0100 to 0.0600 M potassium permanganate, 0.1800 N as to sulfuric acid, and by 62.5, 75.0, 87.5, and 100 volumes of 0.0200 M potassium perman ganate, both aqueous and acidic, in ten hours at 40 ± 0.1° C. has been measured by the weight, nitrogen, total sulfur, sulfate sulfur, and wet strength of the residual wool.
Percentage losses in weight, nitrogen, and non-sulfate sulfur have been shown very similar in fifty-volume baths of either aqueous or acidic permanganate in the same molarity.
With increasing volume of 0.0200 M potassium permanganate, loss of nitrogen by wool has been shown greater in acidic than in aqueous solutions.
In no case did the wool's sulfate sulfur increase although part of its original sulfate sulfur dissolved in acid permanganate.
Wet strength of wool has been shown to decrease more rapidly than weight, nitrogen, or non-sulfate sulfur with increasing mo larity or volume of permanganate and more rapidly in aqueous than in acidic permanganate.
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