Glass Pyriform Separatory Funnel 500ml 24/40 PTFE Stopcock Deschem

Description

Product Overview

The Deschem 500 ml glass pyriform separatory funnel is engineered for laboratory professionals who require dependable liquid‑liquid extraction in a compact, ergonomic form. Its pear‑shaped silhouette not only facilitates comfortable gripping but also offers a clear visual window to monitor phase separation, reducing the risk of cross‑contamination. The funnel is constructed from G3.3 borosilicate glass, a material renowned for its high thermal resistance, chemical inertness, and durability, making it suitable for a wide range of solvents and reagents.

Key structural elements include a precision‑machined 24/40 ground‑glass joint that ensures a leak‑free connection to standard laboratory glassware such as condensers, drying tubes, and receiving flasks. The integrated PTFE stopcock provides smooth, controllable flow control, allowing users to start and stop the transfer of liquids with minimal effort. The stopcock’s chemically resistant PTFE lining prevents degradation when exposed to aggressive acids, bases, or organic solvents, extending the lifespan of the device.

Dimensions are carefully balanced for stability and convenience: the funnel measures approximately 15.74 × 4.33 × 4.33 inches and weighs 13.4 ounces, providing a sturdy base while remaining lightweight enough for easy handling. The 500 ml capacity is ideal for medium‑scale extractions, offering sufficient volume for most routine analytical procedures without occupying excessive bench space.

Performance testing conducted by independent laboratories confirms that the funnel delivers consistent, repeatable separation results, with the PTFE stopcock maintaining a tight seal even after repeated cycles of opening and closing. The borosilicate glass’s low coefficient of thermal expansion (32 × 10⁻⁷ / °C) and high annealing point (560 °C) further guarantee dimensional stability under temperature fluctuations commonly encountered in heating or cooling steps.

Safety considerations are integral to the design. The glass is free of lead and other hazardous additives, complying with international laboratory safety standards. The stopcock’s ergonomic lever reduces hand fatigue during prolonged operations, and the smooth interior surface minimizes the risk of sample adhesion, ensuring complete transfer of valuable reagents.

Usage

In organic synthesis labs, the funnel excels during liquid‑liquid extraction of reaction mixtures, allowing chemists to efficiently separate organic layers from aqueous phases. Its clear glass body enables rapid visual assessment of layer formation, while the PTFE stopcock permits precise control over the removal of the lower aqueous layer without disturbing the upper organic layer.

Environmental testing facilities often employ the funnel for sample preparation, particularly when extracting contaminants from water or soil extracts. The chemically resistant PTFE stopcock ensures that even aggressive solvents used in pollutant analysis do not compromise the stopcock’s functionality, preserving the integrity of the analytical workflow.

Biology laboratories benefit from the funnel’s ability to handle aqueous buffers and organic solvents side by side, facilitating the purification of biomolecules that require phase separation steps. The smooth interior surface reduces protein adsorption, which is critical when working with low‑concentration samples.

Teaching laboratories appreciate the funnel’s user‑friendly design, as students can easily observe the separation process and learn proper technique for operating a stopcock. The robust construction tolerates the occasional mishandling typical of educational settings, making it a cost‑effective choice for academic institutions.

Why Choose Us

Deschem’s commitment to quality is reflected in every aspect of this separatory funnel. The company sources premium borosilicate glass from vetted manufacturers, subjecting each batch to rigorous thermal shock and chemical resistance testing before it reaches the market. This ensures that every funnel meets the exacting standards required by professional laboratories worldwide.

Our PTFE stopcocks are manufactured under controlled conditions to achieve a uniform wall thickness and surface finish, guaranteeing consistent flow rates and a leak‑free seal. The stopcock’s design incorporates a stainless‑steel reinforcement that adds mechanical strength while preserving the chemical inertness of the PTFE lining.

Customer support is a cornerstone of the Deschem experience. Buyers receive comprehensive documentation, including a detailed user manual, safety data sheet, and a quick‑start guide that outlines best practices for setup, operation, and maintenance. In addition, our technical support team is available to answer any questions regarding compatibility with specific reagents or equipment.

We stand behind our products with a limited warranty that covers manufacturing defects for a period of one year from the date of purchase. Should any issue arise, we offer prompt replacement or repair services, minimizing downtime for your laboratory operations.

Key Features

• Durable G3.3 borosilicate glass resists thermal shock and chemical corrosion for long‑term reliability.
• Precision 24/40 ground‑glass joint ensures a secure, leak‑free connection to standard lab apparatus.
• PTFE stopcock provides smooth, controllable flow and withstands aggressive solvents without degradation.
• Pear‑shaped design offers ergonomic handling and clear visual monitoring of phase boundaries.
• Comprehensive after‑sales support includes detailed documentation, technical assistance, and a one‑year warranty.

FAQ

What types of solvents can I safely use with this funnel?

The funnel’s borosilicate glass and PTFE stopcock are compatible with a broad spectrum of solvents, including common organic solvents such as dichloromethane, ethyl acetate, and chloroform, as well as aqueous solutions ranging from distilled water to strong acids and bases. However, it is advisable to avoid prolonged exposure to hydrofluoric acid, as this acid can etch glass. For any specialized solvent, consult the material safety data sheet (MSDS) to confirm compatibility.

How do I clean and maintain the PTFE stopcock?

After each use, rinse the stopcock with a solvent that matches the last liquid processed, followed by a thorough wash with distilled water. For stubborn residues, a mild detergent solution can be applied, ensuring that the PTFE surface is not scratched. Rinse thoroughly and dry with a lint‑free cloth. Periodic inspection for wear or damage is recommended; replace the stopcock if the PTFE lining shows signs of cracking or loss of elasticity.

Can this funnel be used for high‑temperature applications?

Yes, the borosilicate glass used in this funnel has an annealing point of 560 °C and a softening point of 820 °C, allowing it to withstand heating processes commonly employed in reflux or distillation setups. Nevertheless, the PTFE stopcock has a maximum operating temperature of approximately 260 °C; for applications exceeding this temperature, consider using a metal stopcock or alternative glassware designed for high‑temperature use.

Is the funnel compatible with standard laboratory clamps and stands?

The funnel’s base is designed to fit securely into standard ring clamps and retort stands, facilitating stable positioning during extraction or distillation procedures. The 24/40 joint aligns with most laboratory glassware, ensuring seamless integration with condensers, drying tubes, and receiving flasks without the need for adapters.

What warranty and return policy does Deschem offer?

Deschem provides a one‑year limited warranty covering any manufacturing defects. If the product arrives damaged or exhibits a defect within this period, customers can contact our support team to arrange a replacement or repair. Returns are accepted within 30 days of purchase for a full refund, provided the item is returned in its original condition and packaging.