PYREX® 250mL Squibb Glass Separatory Funnel with No. 4 PTFE Stopcock and No. 22 Polyethylene Stopper – 6404-250

The PYREX® 250mL Squibb Glass Separatory Funnel is a durable laboratory glass instrument designed for liquid-liquid extraction, solvent separation, and chemical sample preparation. Featuring a pear-shaped glass body, a No. 4 PTFE Product Standard stopcock, and a No. 22 high-density polyethylene (HDPE) standard taper stopper, the funnel provides controlled liquid discharge and efficient separation of immiscible liquids. The chemically resistant PTFE stopcock allows smooth operation without the grease normally required for glass stopcocks. Suitable for pharmaceutical laboratories, chemical testing facilities, biotechnology laboratories, research institutions, and educational laboratories. Corning+1 Key Features - 250mL Capacity: Suitable for small-to-medium-volume liquid-liquid extraction and solvent separation. - Squibb Pear-Shaped Design: Facilitates separation and controlled drainage of immiscible liquids. - No. 4 PTFE Stopcock: Chemically resistant straight-bore stopcock for controlled liquid flow. - No. 22 Polyethylene Stopper: Closed-bottom HDPE standard taper stopper provides convenient closure. - Grease-Free Stopcock: Reduces the need for lubrication and associated sample contamination. - Laboratory Glass Construction: Offers chemical resistance for routine laboratory procedures. - 76mm Body Diameter: Compact size for laboratory extraction applications. - 311mm Overall Height: Suitable for laboratory support stand arrangements. - 10mm Stem Outer Diameter: Supports controlled liquid drainage. - 65mm Stem Below Stopcock: Facilitates directed liquid discharge. - Replaceable Components: Compatible replacement stoppers and PTFE stopcock components are available. - Reusable Construction: Designed for repeated laboratory separation procedures. Specification Details Brand PYREX® Manufacturer Corning Product Number 6404-250 Product Type Laboratory Separatory Funnel Funnel Style Squibb Separatory Capacity 250mL Material Laboratory Glass Body Shape Pear-Shaped Body Outer Diameter Approximately 76mm Overall Height with Stopper Approximately 311mm Stopcock Type PTFE Product Standard Stopcock Style Straight-Bore PTFE Stopcock Plug Number No. 4 Stopper Type Standard Taper Polyethylene Stopper Number No. 22 Stopper Material High-Density Polyethylene (HDPE) Stopper Design Closed Bottom Stem Outer Diameter Approximately 10mm Stem Length Below Stopcock Approximately 65mm PTFE Stopcock Included Polyethylene Stopper Included Complete Assembly Yes Replacement Stopper Series Corning 7624 Quantity per Pack 1 Piece Quantity per Case 4 Pieces