Abstract
WHILE pure urea shows no tendency to absorb moisture when exposed to air under ordinary conditions, it becomes a remarkably hygroscopic substance if the humidity of the air is at a relatively high level. It is only recently that American chemists from the Bureau of Chemistry and Soils, Washington, D.C., have directed attention to this phenomenon in connexion with the behaviour of urea when present as a constituent of various mixed fertilizers.
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References
Adams and Merz, Ind. and Eng. Chem., 21, 305 (1929).
Whittaker, Lundstrom and Skimp, Ind. and Eng. Chem., 28, 1307 (1934).
Davis, Scholl and Miller, Ind. and Eng. Chem., 27, 69 (1935).
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WERNER, E. Urea as a Hygroscopic Substance. Nature 139, 512 (1937). https://doi.org/10.1038/139512a0
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DOI: https://doi.org/10.1038/139512a0
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