103rapid stirring are necessary while taking melting points because of the low heat conductivity of the acid.
ReferenceFor a discussion of the hydrates of orthophosphoric acid, see SMITH and MENZIES: J . Am. Chem. SOC., 31, 1183 (1909 hydrolyze rapidly and may be recovered from the water solution unchanged. It reacts slowly with the oxygen of the air, liberating iodine.
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