What percentage of available chlorine is gas chlorine considered to be?

Gas chlorine is considered to be 100 percent available chlorine because it exists in a pure form that can be readily utilized for disinfection and sanitation purposes. This means that when gas chlorine is added to water or any substances in need of disinfection, it releases chlorine instantly, providing its full sanitizing effect without any dilution or degradation.

In contrast, other forms of chlorine, such as sodium hypochlorite or calcium hypochlorite, contain varying percentages of actual chlorine and require consideration of their concentration and active ingredients to determine their effectiveness. Therefore, gas chlorine has the highest efficiency in terms of available chlorine, making it a crucial chemical in water treatment and sanitation processes.