Natural Home Cures Himalayan Crystal Salt Contains Chlorine (Cl)

Chlorine(1) is used by the body in its ionic form—chloride. Chloride ions functions as electrolytes and in the body are chiefly found in the fluid surrounding the outside of cells. Chloride helps to regulate the amount of fluid influx and efflux in various parts of the body as well as helps to neutralize excess acid thereby creating a more alkaline blood pH. Alternative medicine proponents consider blood that has an alkaline pH to be optimal for human health. Specifically, alkaline blood may improve cellular functioning and boost immune system response.(2)
Dietary Sources
Seaweed, Rye, Tomatoes, Lettuce, Olives and Natural Home Cures Himalayan Crystal Salt
Source References 
(1) Wikipedia - Chlorine 
(2) Approach Wellness - Alkaline