DESCRIPTION

Sodium Chloride occurs as a transparent to opaque, white crystalline solid of variable particle size. Salt is a generic term applied to commercially produced Sodium Chloride. It is available in various crystalline forms, referred to as dendritic salt, evaporated salt, rock salt (may be white to off-white), solar salt, or simply salt. It may contain up to 2% (total) of suitable food-grade anticaking, free-flowing, or conditioning agents, either singly or in combination. It may contain not more than 14 mg/kg of calcium, potassium, or sodium ferrocyanide alone or in combination, expressed as anhydrous sodium ferrocyanide, or not more than 25 mg/kg of green ferric ammonium citrate as a crystal-modifying and anticaking agent. Food-grade dendritic salt can contain NMT 29 mg/kg of calcium, potassium, or sodium ferrocyanide, expressed as anhydrous sodium ferrocyanide. If labeled as iodized, it contains not less than 0.006% and not more than 0.010% of potassium iodide. Sodium Chloride remains dry in air at a relative humidity below 75%, but becomes deliquescent at higher humidity. One g is soluble in 2.8 mL of water at 25°, in 2.7 mL of boiling water, and in about 10 mL of glycerin. Sodium Chloride containing water-insoluble anticaking, free-flowing, and conditioning agents may produce cloudy solutions or may dissolve incompletely. A 1:20 aqueous solution usually has a pH between 5.5 and 8.5 (the pH may be higher if alkaline conditioning agents have been added).