It is used as a descaling agent, it is very effective for carbonated scale. Industrial cleaning agent. Dry cement remover. Surface treatment. Eliminator of deposits or lime scale. Chlorine and hypochlorite Stabilizer in swimming pools. Ceramic and metal cleaning, but oxidizable metals should be avoided. Bleaching of textiles and pulp, to make paper. Cleaning in homes. Component in fire extinguishers. Manufacture of inks and pigments.