Chemglass Dewar Type Condenser 14/20 Joints

The Chemglass CG-1209-A-20 is a Dewar type condenser made from borosilicate glass, primarily used in laboratory settings for efficient cooling of volatile solvents or for trapping cold vapors. Its distinguishing feature is a large opening at the top, designed to accommodate cooling agents such as dry ice/acetone mixtures or liquid nitrogen, allowing for very low operating temperatures. This specific model features a 14/20 standard taper outer joint, typically set at a 75° angle to the condenser body, and a corresponding 14/20 inner drip tip joint at the bottom. The "90 x 37mm" dimensions often associated with this part number refer to the height of the inner cooling chamber (90mm) and its outer diameter (37mm). This design is crucial for applications requiring effective condensation of low-boiling point compounds, often in vacuum lines or rotary evaporation setups.