Salt is composed primarily of sodium chloride, with the formula NaCl.
The elemental chlorine is usually produced by the electrolysis of sodium chloride dissolved in water. Along with chlorine, this chloralkali process yields hydrogen gas and sodium hydroxide, according to the chemical equation:
2NaCl + 2H2O -> Cl2 + H2 + 2NaOH
Chlorine It has a disagreeable, suffocating odor that is detectable in concentrations as low as 3.5 ppm and is poisonous. This should be avoided as a catalyst completely just for personal safety.