Pure salt is almost pure sodium chloride and has all its inherent properties. Although it is in a highly purified state, it still contains traces of magnesium, which can absorb moisture from the atmosphere and render the salt lumpy.

Pure salt comes in the form of small colourless crystals or a white granular powder, free from visible contamination with clay, grit and other extraneous adulterants and impurities. Care is taken by principle company during manufacture, by modifying its crystalline nature, to see that it does not cake hard during storage.