PYREX 31770-250EC Gas Washing Bottle 250 mL with Extra Coarse Fritted Cylinder

The PYREX 31770-250EC Gas Washing Bottle 250 mL with Extra Coarse Fritted Cylinder is a high-quality, reusable laboratory glass apparatus designed for gas washing, gas humidification, gas absorption, and controlled gas-liquid contact during scientific and chemical laboratory procedures. Manufactured by Corning from durable borosilicate glass, this tall-form gas washing bottle features a cylindrical body, a stable hexagonal base, and a removable standard taper glass stopper containing an integrated gas distribution tube. The apparatus incorporates a 12 mm diameter extra-coarse fritted glass cylinder with a nominal pore distribution of 170–220 micrometres. The relatively large pores allow gas to disperse through a washing liquid with less resistance than finer fritted distributors. During operation, gas enters through the central vertical inlet tube, passes through the submerged fritted cylinder, bubbles through the washing solution, and exits through the sidearm outlet. Its design is particularly suitable for humidifying carbon dioxide-air mixtures used in cell culture incubators, as well as other laboratory gas-conditioning applications. The transparent glass construction provides convenient observation of liquid levels and gas bubbling, making the bottle useful in chemical analysis laboratories, biotechnology facilities, pharmaceutical research institutions, universities, and scientific research centres. Key Features - Original Corning PYREX laboratory glassware. - 250 mL nominal capacity. - Durable borosilicate glass construction. - Tall cylindrical body with stable hexagonal base. - Extra-coarse fritted glass cylinder for gas distribution. - Nominal pore distribution of 170–220 µm. - Approximately 12 mm diameter fritted cylinder. - Standard taper 29/42 glass stopper. - Approximately 8 mm outside diameter sidearm tubing. - Promotes gas-liquid contact during washing and absorption. - Relatively low gas-flow resistance compared with finer frits. - Suitable for gas humidification and laboratory gas conditioning. - Transparent construction for observing liquid levels and bubbling. - Reusable laboratory apparatus. - Supplied as one complete gas washing bottle with stopper and fritted cylinder. Specification Details Brand PYREX Manufacturer Corning Catalogue Number 31770-250EC Product Type Gas Washing Bottle with Extra Coarse Fritted Cylinder Material Borosilicate Glass Capacity 250 mL Bottle Style Tall Form Bottle Shape Cylindrical Base Design Hexagonal Neck Style Short Stopper Type Hollow Glass Standard Taper Stopper 29/42 Fritted Distributor Glass Cylinder Frit Porosity Extra Coarse Nominal Pore Distribution 170–220 µm Fritted Cylinder Diameter 12 mm Inlet/Outlet Tubing Outside Diameter 8 mm Approximate Overall Diameter 51 mm Height Without Stopper 240 mm Height With Stopper 290 mm Colour Transparent Sterility Non-Sterile Reusable Yes Quantity per Pack 1 Complete Bottle Quantity per Case 1 Complete Bottle Applications Gas Washing, Gas Absorption, Gas Humidification