Abstract
AbstractPotassium benzoate is one of the ingredients in the formulation of SR 136 Whistling Composition, but some ambiguity exists in the chemical literature as to its composition. In this investigation, it was established that potassium benzoate precipitates from aqueous alcohol and crystallizes from water as colourless plates, it does not contain water of crystallization and it does not appear to take up water from its environment. Its DSC trace over the temperature range 310 K‐730 K consists of a single endotherm occurring near 714 K, which is probably due to melting, the heat of fusion being ca. 213 J/g. It can be prepared from stoichiometric amounts of benzoic acid and either potassium hydroxide or potassium bicarbonate.
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