Aldrich 100 ml Round Bottom Flask ST/NS 14/20 with Septum Inlet - Lot of 5 Flasks

The Aldrich (Sigma-Aldrich) Z103314 is a specialized 100 mL Round Bottom Flask designed for air-sensitive or moisture-sensitive synthetic chemistry. Molded from high-quality borosilicate glass, this vessel features a standard 14/20 Ground Glass Joint on the center neck, which is a common size for microscale or small-scale glassware setups. The defining technical characteristic of this flask is the integrated Side-Arm Septum Inlet, which allows for the addition of reagents or the withdrawal of samples via syringe without ever exposing the internal environment to the atmosphere. This setup is critical for reactions involving organometallics or anhydrous solvents where maintaining an inert gas blanket is essential.

By utilizing a rubber or silicone septum on the side arm, researchers can maintain a vacuum-tight or pressure-stable seal while performing cannula transfers or injecting catalysts. This dual-access design prevents the need to open the main 14/20 joint, which would otherwise risk the ingress of oxygen or humidity. The flask's spherical geometry ensures uniform heating and is ideally suited for use with magnetic stirring or small-scale rotary evaporation. This specific offering is provided as a total of 5 flasks, offering a convenient bulk solution for equipping a synthetic workstation or a specialized research group.

Used, in great condition.