Separatory Funnel — 500mL, PTFE Stopcock, 24/40 Top Joint

Liquid-liquid extraction — the art of pulling a compound from one solvent into another — is only possible with a separatory funnel, the most elegant glassware in the organic chemist's arsenal.

The PTFE stopcock never sticks, never requires grease, and is chemically inert to virtually all laboratory solvents, eliminating the most common cause of separatory funnel failure. The 500mL pear shape is optimal for 100–400mL extractions, balancing capacity against maneuverability. Borosilicate 3.3 body accepts 24/40 standard ground glass stopper.

• 500mL pear-shaped body; PTFE key stopcock (no grease required)
• 24/40 ground glass top stopper; borosilicate 3.3 glass
• Graduations at 50mL intervals; compatible with standard ring stand clamps
• Inert to ethyl acetate, DCM, hexane, acetone, and most organic solvents

Every purchase directly funds independent physics research at the Golden Physics Project.