On the Presence of NaOH in Crystalline NaCl

Abstract
The alkalinity of NaCl crystals from various sources are reported with the method of its determination. Melt‐grown crystals are usually more alkaline than natural rock salt. The alkalinity may vary in a melt‐grown crystal. The alkalinity appears in melted salt, probably as a result of hydrolysis which produces NaOH and possibly by a reaction capable of liberating chlorine.