- Capacity: 125 mL (approx. 4 oz).
- Material: Heavy-duty Corning PYREX® borosilicate glass.
- Stopcock: Rotaflo® PTFE (Teflon) plug, typically size GP-3.
- Stopper: Includes a No. 22 Standard Taper hollow glass stopper (and often a polyethylene backup).
- Dimensions: Approximately 301 mm in total height with a body diameter of ~60 mm.
- Stem: Roughly 10 mm Outer Diameter (O.D.).
Corning +4
Performance Features
- No Lubrication Required: The PTFE Rotaflo plug does not require grease, eliminating a common source of sample contamination.
- Leak-Proof & Non-Freezing: The “Slammer” style stopcock uses a knurled knob to seat a PTFE plug against a glass valve, preventing the stopcock from “freezing” or seizing, even with caustic materials.
- Precise Control: The screw-style operation allows for extremely fine, drop-wise flow control, which is essential for separating layers with similar densities.
- Chemical Resistance: Highly resistant to acids, bases, and organic solvents; suitable for thermal environments from
to
.
Common Applications
- Liquid-Liquid Extractions: Separating immiscible liquids (e.g., oil and water) based on their differing densities.
- Sample Purification: Washing organic products with water or brine to remove impurities.
- Controlled Addition: Drip-wise introduction of reagents into a reaction
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