Dropping Funnel, 250mL - Pear-Shaped - With 19/26 Plastic Stopper & Glass Key Stopcock - Borosilicate Glass

This 250mL separating funnel is made from borosilicate 3.3 glass in a pear shape, with a glass key stopcock and an interchangeable 19/26 plastic stopper. It is ungraduated. The funnel works as a separating funnel, holding two immiscible liquids and drawing the lower layer off at the interface, and as a dropping funnel delivering reagent into a vessel below. The glass key stopcock meters flow down to individual drops for either use. The pear profile tapers toward the stem, concentrating the boundary between two liquid layers into a narrow band so the cut point is easier to judge by eye. The fully transparent borosilicate wall keeps the interface visible along its travel. The funnel measures 10.5 inches tall upright with a body 3 inches across at its widest point. The stopper fits a 1 inch top opening, and the spout extends 3 inches below the stopcock to give clearance for a receiving flask. Borosilicate glass is autoclavable, with chemical durability suited to organic solvent extraction.