Bl This standard establishes the characteristics and test methods of the industrial products that are used as loads in the different types of carbon tetrachloride fire extinguishers, considered in the respective IRAM standards. B-2 Two types of load are contemplated: a) carbon tetrachloride for fire extinguishers to be used in environments whose temperature is not lower than -20C b) nonfreezable carbon tetrachloride made up of a mixture of carbon tetrachloride and a liquid antifreeze, for fire extinguishers to be used in environments whose temperature is below -20C.