Strict quality controls ensure this high purity reagent grade water meets or exceeds ASTM Type I, CAP/CLSI clinical laboratory reagent water and USP-NF purified water criteria This high purity reagent grade water is free of all organic and inorganic contaminants and is packaged at 18 megaohms-cm resistivity, the absolute limit for completely pure water There is 1 gallon of deionized water in a handled bottle