_______ is added to large freezers for preserving fish and meat on an industrial basis for fast solidification of ice.
Ammonium Chloride
Ammonium chloride is added to large blocks of ice, for preserving fish and meat while transportation and being sold, to obtain low temperature and for faster solidification of ice during its manufacturing process. Consumption of ammonium chloride is known to be harmful to our intestine so we should thoroughly wash the fish after buying it.