Abstract
The phase diagram of the binary system tetramethylammonium bromide-water was studied by the differential thermal analysis. In the stable region two phases, ice and the salt itself, were detected, and in the metastable region, three tetramethylammonium bromide hydrates (bromide-water, 1 : 4, mp 68.8°C, 1 : 5, mp 36.0°C, 1 : 7.5, mp −19.5°C) were found. Formation of (CxH2x+1)4NBr·nH2O (x = 1–3, n = 4, 5, 7.5) hydrates was revealed.
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