Chemglass Rotary Evaporator Connector Double Threaded for 18-425 Vials

The Chemglass CG-1318-22 Rotary Evaporator Connector is a specialized glass adapter designed to facilitate the direct concentration of samples from chromatography or storage vials without the need for manual transfer to a standard round-bottom flask. This "double-threaded" design serves as a bridge between the rotary evaporator’s vapor tube and small-scale sample containers. One end of the adapter features a standard SJ 24/40 ground glass joint, which fits securely into the drive head of most common rotary evaporators, while the other end consists of a high-performance PBT (polybutylene terephthalate) threaded connector.

The primary technical advantage of this connector is its compatibility with 18-425 GPI threaded vials. By utilizing an internal PTFE-faced silicone septa or gasket within the threaded cap, the adapter maintains a vacuum-tight seal, allowing for efficient solvent removal under reduced pressure directly into the vial. This streamlined workflow is critical for high-throughput labs as it minimizes sample loss, prevents cross-contamination from intermediate vessels, and allows the sample to remain in its final storage container once the evaporation process is complete. The glass body is constructed from heavy-wall borosilicate glass to withstand the mechanical stresses of rotation and the thermal gradients of the heating bath.