Due to extreme weather, the Flinn Warehouse is not shipping today, 1/23/2026. We expect to resume normal shipping on Monday, 1/26/2026. We regret this inconvenience. For more information, please call us at 800-452-1261.
Indefinite if kept tightly closed. If your distilled water is stored for a long period, it will gradually become acidic, due to the presence of dissolved CO2. Boiling the water before use will drive off and eliminate the dissolved CO2.