Separatory Funnel United Scientific 81202 Polypropylene 250mL Lab

Description

Product Overview

United Scientific™ 81202 is a 250 mL polypropylene separatory funnel engineered for demanding laboratory environments where precision, durability, and chemical resistance are essential. The funnel’s clear, high‑clarity polypropylene body allows technicians to monitor phase boundaries with confidence, while the material’s inherent resistance to acids, bases, and organic solvents reduces the risk of degradation over time. A leak‑proof threaded screw cap secures the funnel during transfers, preventing spills and exposure to hazardous substances. The integrated stopcock incorporates a self‑lubricating PTFE plug that slides smoothly along the stem, delivering controlled flow without the need for additional greasing or maintenance. Dimensions of 11.9 × 3.9 × 3.6 inches and a lightweight 3.2 oz weight make the funnel easy to handle, yet its robust construction withstands repeated use and autoclave cycles when required. The funnel meets ASTM standards for laboratory glassware substitutes, offering a reliable alternative to traditional glass separatory funnels while eliminating the fragility associated with glass. With a best‑seller rank of #54 in Lab Separatory Funnels, this model has earned a reputation for consistent performance among researchers, educators, and quality‑control laboratories worldwide.
The manufacturing process utilizes injection‑molded high‑grade polypropylene that is tested for dimensional accuracy and surface finish, ensuring a uniform wall thickness that contributes to both optical clarity and structural integrity. Each unit undergoes a rigorous leak‑test at pressures exceeding typical operational levels, guaranteeing a seal that remains intact even under vigorous shaking or rapid phase changes. The product is compliant with ISO 9001 quality‑management standards, reflecting United Scientific’s commitment to delivering reliable laboratory equipment that adheres to internationally recognized benchmarks. In addition, the funnel’s design incorporates a graduated scale etched onto the interior wall, providing users with a quick visual reference for volume measurements without the need for external measuring devices. This feature enhances workflow efficiency, particularly in high‑throughput environments where time savings translate directly into increased productivity.

Usage

In routine analytical chemistry protocols such as liquid‑liquid extraction, acid‑base separations, and solvent washing, the 250 mL capacity provides ample volume for batch processing while maintaining a compact footprint on the bench. The clear polypropylene construction enables users to visually assess the interface between aqueous and organic layers, facilitating precise stop‑off points and minimizing cross‑contamination. Because the funnel is resistant to a wide range of solvents—including chloroform, dichloromethane, hexane, and methanol—it can be employed in both organic synthesis laboratories and environmental testing facilities where aggressive chemicals are commonplace. The leak‑proof screw cap ensures safe transport of the funnel between workstations, and the PTFE‑lined stopcock allows for fine‑tuned dispensing of the lower phase without sudden surges that could disturb the upper layer. Users ranging from undergraduate students in teaching labs to seasoned researchers in pharmaceutical development find the funnel intuitive to operate, requiring only basic training to master the opening and closing of the stopcock. Its lightweight design reduces fatigue during repetitive tasks, and the funnel can be easily cleaned with standard laboratory detergents, then rinsed and stored without fear of breakage.
Beyond standard separations, the funnel excels in applications such as density gradient centrifugation preparation, where precise layering of solutions is critical, and in microbiological work where sterile handling of liquid cultures is required. The chemical‑resistant nature of polypropylene also makes the funnel suitable for handling corrosive acids like hydrochloric or sulfuric acid, provided appropriate safety protocols are followed. For quality‑control laboratories, the funnel’s reproducible performance supports method validation and compliance with regulatory standards such as GLP and GMP. When used in teaching environments, the clear body serves as an educational tool, allowing students to observe phase separation dynamics in real time, thereby reinforcing theoretical concepts with practical demonstration.
Proper maintenance extends the lifespan of the funnel. After each use, the stopcock should be flushed with a compatible solvent to remove residual material, and the interior can be scrubbed with a soft brush if stubborn residues remain. The screw cap’s O‑ring should be inspected periodically for wear and replaced if necessary to maintain the leak‑proof seal. Storage in a dry, dust‑free cabinet protects the polypropylene from UV exposure, which can cause discoloration over prolonged periods. When autoclaving is required for sterilization, the funnel tolerates temperatures up to 121 °C for short cycles, though it is advisable to verify the manufacturer’s guidelines to avoid deformation of the PTFE plug.

Why Choose Us

Choosing the United Scientific™ 81202 separatory funnel means selecting a product that combines rigorous engineering with cost‑effective manufacturing, delivering a tool that meets the high standards of professional laboratories without the premium price tag of glass alternatives. The use of high‑grade polypropylene ensures that the funnel is both chemically inert and impact resistant, eliminating the common issue of glass breakage that can lead to sample loss and safety hazards. Each unit undergoes a comprehensive quality‑control process that includes dimensional verification, leak testing, and functional assessment of the PTFE stopcock to guarantee consistent performance across every batch. The threaded screw cap is manufactured to tight tolerances, providing a seal that remains reliable even after repeated cycles of opening, cleaning, and autoclaving. United Scientific’s commitment to customer satisfaction is reflected in responsive technical support, detailed product documentation, and a straightforward return policy for any items that do not meet expectations. By offering a durable, easy‑to‑use separatory funnel, the company helps laboratories increase throughput, reduce downtime caused by equipment failure, and maintain the integrity of critical analytical results.
In addition to product quality, United Scientific emphasizes sustainability by sourcing recyclable polypropylene and implementing manufacturing processes that minimize waste. The company offers a limited‑lifetime warranty that covers material defects, underscoring confidence in the funnel’s durability. Training resources, including video tutorials and detailed user manuals, are readily available on the corporate website, enabling laboratories to quickly integrate the funnel into existing workflows. Global distribution centers ensure rapid delivery to research institutions worldwide, reducing lead times and supporting time‑critical projects. Moreover, the brand’s extensive experience in supplying laboratory glassware and plasticware translates into a deep understanding of user needs, allowing continuous improvement of product designs based on real‑world feedback.
Customer support extends beyond the point of sale; a dedicated technical helpline assists with troubleshooting, while an online knowledge base provides answers to common operational questions. For institutions requiring bulk purchases, United Scientific offers volume discounts and customized packaging options to streamline inventory management. The combination of robust product performance, proactive service, and a commitment to environmental responsibility makes the 81202 funnel a strategic choice for laboratories seeking reliable, cost‑effective separation solutions.

Key Features

• Leak‑proof threaded screw cap prevents spills and exposure during transfers.
• Self‑lubricating PTFE stopcock provides smooth, precise flow control.
• High‑clarity polypropylene body resists acids, bases, and organic solvents.
• Lightweight 3.2 oz design reduces fatigue for repetitive laboratory tasks.
• Comprehensive manufacturer support and easy‑return policy for peace of mind.

FAQ

Can this funnel be autoclaved for sterilization?

Yes, the polypropylene construction tolerates standard autoclave cycles up to 121 °C for short periods, but it is recommended to verify the manufacturer’s guidelines to avoid deformation of the PTFE plug.

What solvents is the polypropylene material compatible with?

Polypropylene is resistant to a broad range of solvents, including chloroform, dichloromethane, hexane, methanol, acetone, and many acids and bases, making it suitable for most laboratory applications.

How does the PTFE stopcock differ from a standard metal stopcock?

The PTFE stopcock offers self‑lubricating properties that provide smoother operation, reduced wear, and chemical inertness, whereas metal stopcocks can corrode or require greasing for optimal performance.

Is a replacement cap or stopcock available for this model?

Yes, United Scientific supplies replacement caps and PTFE stopcocks as part of its accessories catalog, ensuring continued service life for the funnel.

What is the recommended cleaning procedure after use?

Rinse the funnel with a compatible solvent to remove residues, scrub the interior with a soft brush if needed, then wash with laboratory detergent, rinse thoroughly with deionized water, and allow to air‑dry.