Which chemical is known for its high concentration of available chlorine in water treatment?

Calcium hypochlorite is recognized for its high concentration of available chlorine, which is crucial in water treatment processes. This chemical is commonly used as a disinfectant and is effective in killing bacteria and other pathogens in water systems. It’s often available in solid form as a powder or tablets and, when added to water, releases chlorine, which helps in sanitation efforts by breaking down organic materials and ensuring safe drinking water.

In contrast, calcium chloride serves primarily as a deicer or desiccant and does not have significant use as a disinfectant in water treatment; while sodium bicarbonate is mainly used to help adjust the pH of water rather than disinfect. Potassium permanganate, although useful as an oxidizing agent and for treating specific contaminants, does not have the same high concentration of available chlorine as calcium hypochlorite. Therefore, the choice of calcium hypochlorite is accurate for its role in effectively providing a reliable source of chlorine in water treatment operations.