1, fried salt needs to be fried for about 10 minutes. Table salt refers to different sources of sea salt, well salt, mineral salt, lake salt, earth salt and so on. Their main ingredient is sodium chloride, the state regulations well salt and mine salt sodium chloride content shall not be less than 95%.

2, the main component of salt, ionic compounds. Pure sodium chloride crystals are colorless and transparent cubic crystals, due to the presence of impurities so that the general situation of sodium chloride for the white cubic crystals or fine crystal powder, specific gravity of 2.165 (25/4 ℃), melting point of 801 ℃, boiling point of 1442 ℃, the density of 2.165 grams / cubic centimeter.