Calcium hypochlorite via calcium process: Available chlorine: 65%min. Form: in powder/granular Moisture: 5%max. Insoluble material: 12% Un no.: 1748 Calcium hypochlorite via sodium process: Available chlorine: 65%/70%min. Form: in granular Moisture: 5-8% Insoluble material: 5%max. Un no.: 2880 Packing in 40/45kg net plastic drum.