United Scientific SF149-50 Glass Conical Seperatory Funnel with PTFE Stopcock and Plastic Stopper, 50ml Capacity (Pack of 2)

Description

Product Overview

The United Scientific SF149-50 is a high‑quality glass conical separatory funnel designed for precise liquid‑liquid extraction in chemistry and biology laboratories. Constructed from borosilicate glass, the funnel offers excellent thermal resistance and chemical durability, allowing it to withstand a wide range of solvents, acids, and bases without compromising structural integrity. The 50 ml capacity provides a versatile volume for small‑scale experiments, while the conical shape promotes efficient phase separation and easy collection of the lower layer. A PTFE (polytetrafluoroethylene) stopcock is integrated into the stem, delivering a chemically inert sealing surface that resists corrosion and ensures a smooth, leak‑free operation even after repeated use. The accompanying plastic stopper fits securely into the funnel’s neck, creating a tight seal that prevents vapor loss and maintains a controlled environment during mixing. The product is supplied as a convenient two‑pack, enabling laboratories to stock essential separatory equipment while reducing per‑unit cost. Dimensions of the funnel are approximately 11.7 × 6 × 2.9 inches, and the total weight is only four ounces, making it easy to handle and store.

Usage

This separatory funnel is ideally suited for a variety of laboratory applications, including organic synthesis, analytical chemistry, environmental testing, and educational demonstrations. Researchers can employ the funnel for extracting organic compounds from aqueous solutions, performing acid‑base extractions, or separating immiscible liquids such as oil and water. The PTFE stopcock allows for precise control of the outflow, enabling users to stop the discharge at the exact moment the desired phase reaches the stopcock, thereby minimizing cross‑contamination. In teaching labs, the clear glass construction provides students with a visual understanding of phase behavior, while the durable stopper and stopcock ensure safety and longevity throughout multiple semesters of use. The compact size and lightweight design also make the funnel suitable for field work, where portability and reliability are essential. Whether used in a university research facility, a pharmaceutical development lab, or a quality‑control environment, the SF149-50 delivers consistent performance and reproducible results.

Why Choose Us

United Scientific Supplies has a long‑standing reputation for delivering dependable laboratory equipment that meets rigorous industry standards. Each SF149-50 funnel undergoes a thorough quality‑control process, including visual inspection for glass imperfections, verification of PTFE stopcock integrity, and testing of stopper fit to guarantee a leak‑free seal. The product complies with ASTM standards for borosilicate glassware, ensuring that it can tolerate temperature fluctuations from -20 °C to 200 °C without cracking. Customers benefit from responsive technical support and a clear warranty policy that covers manufacturing defects, providing peace of mind and confidence in the durability of the equipment. Additionally, the two‑pack configuration offers cost efficiency for laboratories that require multiple funnels for parallel experiments or backup units. By choosing United Scientific, users gain access to a trusted brand, reliable performance, and a commitment to ongoing service and product improvement.

Key Features

• Durable borosilicate glass construction resists thermal shock and chemical corrosion.
• Precision PTFE stopcock provides smooth operation and a chemically inert sealing surface.
• Secure plastic stopper ensures a tight, vapor‑proof seal during mixing and extraction.
• Compact 50 ml capacity ideal for small‑scale reactions and educational demonstrations.
• Responsive customer support and warranty coverage for manufacturing defects.

FAQ

What solvents can the funnel safely handle?

The borosilicate glass body is compatible with most organic solvents, acids, and bases, including ethanol, methanol, acetone, dichloromethane, hydrochloric acid, and sodium hydroxide solutions.

Can the PTFE stopcock be replaced if it becomes damaged?

Yes, United Scientific offers replacement PTFE stopcocks that are interchangeable with the SF149‑50 model, allowing you to restore full functionality without purchasing a new funnel.

Is the plastic stopper reusable after cleaning?

Absolutely. The stopper can be rinsed with appropriate solvents and dried before reuse, maintaining its sealing performance for many cycles.

What is the recommended cleaning procedure?

Rinse the funnel with distilled water followed by a suitable solvent for the chemicals previously used. Allow the funnel to air‑dry or use a lint‑free cloth to prevent water spots.

Does the product come with any certification?

The SF149‑50 meets ASTM standards for laboratory glassware and is manufactured in facilities that follow ISO‑9001 quality‑management protocols.