250ml Chemistry Lab High-Quality PTFE Constant Pressure Funnel

**Product Introduction: PTFE Constant Pressure Dropping Funnel**

The PTFE Constant Pressure Dropping Funnel is a precision-crafted laboratory apparatus designed for demanding chemical processes where inertness, purity, and controlled reagent addition are paramount. Constructed entirely from high-grade polytetrafluoroethylene (PTFE), this funnel excels in applications involving aggressive chemicals, high-temperature reactions, and ultra-clean environments.

**PTFE Material Advantages:**

PTFE, renowned as Teflon®, is the cornerstone of this product's superior performance. It offers exceptional **chemical inertness**, resisting attack by virtually all aggressive reagents, including concentrated acids, bases, halogens, and potent organic solvents. This ensures zero contamination of sensitive reactions and preserves the purity of both the stored reagent and the final product. Its material properties include outstanding **thermal stability**, maintaining structural integrity and non-stick characteristics from cryogenic temperatures up to approximately 250°C. Furthermore, PTFE's **smooth, non-stick surface** prevents residue build-up, allows for easy cleaning, and ensures the smooth, consistent flow of even viscous liquids.

**Product Functionality:**

This funnel integrates a constant pressure (pressure-equalizing) design. Its key feature is a sidearm that connects the funnel's reservoir to the receiving vessel, maintaining equal pressure during operation. This eliminates pressure differentials that can cause erratic dripping or sudden surges, enabling a **slow, steady, and highly controllable dropwise addition** of reagents. Such precise control is critical for:

*   Moderating exothermic reactions for safety.

*   Controlling reaction rates and selectivity in synthesis.

*   Performing accurate titrations or kinetic studies.

*   Adding sensitive or air/moisture-sensitive reagents (when used with appropriate inlet valves or under inert atmosphere setups).

**Typical Applications:**

The PTFE Constant Pressure Dropping Funnel is indispensable in advanced research and industrial laboratories, particularly in:

* Organofluorine & Specialized Organic Synthesis: Handling corrosive intermediates.

* High-Purity Chemistry:Semiconductor processing, pharmaceutical research (APIs), and analytical sample preparation where metallic or ionic contamination must be avoided.

* Inorganic & Coordination Chemistry:Using strong mineral acids or halogenating agents.

* Polymer Chemistry: Involving monomers or catalysts sensitive to metal ions.

* General Laboratory Use: For any reaction requiring the controlled addition of aggressive solvents, strong acids (e.g., hydrofluoric, sulfuric, nitric), or strong bases.

In summary, the PTFE Constant Pressure Dropping Funnel combines the ultimate in chemical resistance with precise fluid handling, making it the vessel of choice for the most challenging and purity-sensitive liquid transfer operations in modern science and industry.