PYREX® 250mL Squibb Glass Separatory Funnel with No. 4 PTFE Stopcock and No. 22 Glass Stopper – 6402-250

The PYREX® 250mL Squibb Glass Separatory Funnel is a high-quality laboratory instrument designed for liquid-liquid extraction, solvent separation, and chemical sample preparation. Manufactured from durable borosilicate glass, it features a pear-shaped body, a No. 4 PTFE Product Standard stopcock, and a No. 22 hollow glass standard taper stopper. The PTFE stopcock fits into a micro-finished glass barrel to provide smooth, grease-free operation and controlled liquid discharge. Suitable for pharmaceutical laboratories, chemical testing facilities, biotechnology laboratories, research institutions, and educational laboratories. 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 Glass Stopper: Hollow standard taper glass stopper provides a secure closure. - Micro-Finished Stopcock Barrel: Helps reduce sticking and eliminates the need for grease lubrication. - Borosilicate Glass Construction: Provides good chemical resistance and thermal durability. - 76mm Body Diameter: Compact size for routine laboratory extraction procedures. - 311mm Overall Height: Suitable for standard laboratory support arrangements. - 65mm Stem Below Stopcock: Facilitates controlled liquid drainage. - Replaceable Components: Compatible glass stopper and PTFE stopcock replacements are available. - Reusable Construction: Suitable for repeated laboratory applications. Corning+1 Specification Details Brand PYREX® Manufacturer Corning Product Number 6402-250 Product Type Laboratory Separatory Funnel Funnel Style Squibb Separatory Capacity 250mL Material Borosilicate 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 Stopcock Barrel Micro-Finished Glass Stopper Type Standard Taper Glass Stopper Stopper Number No. 22 Stopper Style Hollow Glass Stem Outer Diameter Approximately 10mm Stem Length Below Stopcock Approximately 65mm PTFE Stopcock Included Glass Stopper Included Grease Lubrication Required No Replacement Glass Stopper Corning 7650-22 Replacement PTFE Stopcock Assembly Corning 7681-4 Quantity per Pack 1 Piece Quantity per Case 4 Pieces Applications Liquid-Liquid Extraction, Solvent Separation, Chemical Analysis, Pharmaceutical Sample Preparation