Dropping Funnel 500ml PTFE Stopcock by EISCO Borosilicate Glass

Description

Product Overview

The EISCO Dropping Funnel is engineered for scientists, educators, and hobbyists who demand accuracy and durability in liquid handling. Constructed from high‑quality borosilicate glass, the funnel resists thermal shock and chemical corrosion, ensuring a long service life even under demanding laboratory conditions. Its 500 ml capacity provides ample volume for a variety of experiments, from titrations to reagent transfers, while the open‑top design facilitates easy loading and cleaning. The integrated PTFE key stopcock offers smooth, leak‑free control of flow rates, allowing users to dispense liquids drop‑by‑drop or in a steady stream as required. The cylindrical shape promotes uniform distribution of liquid and minimizes splashing, making the funnel a reliable tool for precise work. Dimensions of 2.5 × 2.5 × 14 inches and a lightweight 14.11 oz weight make it easy to handle and store.

Usage

This funnel excels in a wide range of settings. In academic laboratories, it supports chemistry and biology courses where students perform quantitative transfers, extractions, and filtrations. Research facilities rely on its chemical resistance for handling aggressive solvents, acids, and bases without compromising the glass integrity. Home‑based science enthusiasts appreciate the clear visibility of the borosilicate material, which allows them to monitor liquid levels and avoid over‑filling. The PTFE stopcock is especially useful in titration setups, where precise droplet control can affect the outcome of an experiment. The funnel also integrates seamlessly with standard laboratory glassware such as beakers, flasks, and condensers, making it a versatile addition to any bench. Its ergonomic design reduces hand fatigue during prolonged use, and the open top simplifies the addition of solid reagents or powders directly into the funnel.

Why Choose Us

Choosing the EISCO Dropping Funnel means selecting a product backed by rigorous quality assurance and a reputation for scientific reliability. Each funnel undergoes a multi‑stage inspection process that verifies glass thickness, optical clarity, and stopcock functionality. The PTFE key stopcock is manufactured to exacting tolerances, guaranteeing a tight seal that prevents leaks even under pressure differentials. EISCO’s commitment to customer satisfaction includes responsive technical support, a clear warranty policy, and access to replacement parts should any component require service. Our manufacturing facilities adhere to ISO‑9001 standards, ensuring consistent production quality across every batch. By investing in this funnel, users benefit from a tool that combines durability, precision, and ease of use, reducing the need for frequent replacements and minimizing experimental error.

Key Features

• High‑quality borosilicate glass resists thermal shock and chemical attack for long‑term reliability.
• PTFE key stopcock provides smooth, leak‑free flow control for precise dispensing.
• 500 ml capacity balances ample volume with compact footprint for versatile lab use.
• Cylindrical open‑top design simplifies loading, cleaning, and integration with other glassware.
• Responsive customer support and warranty coverage ensure peace of mind after purchase.

FAQ

Can the funnel be used with corrosive chemicals?

Yes. Borosilicate glass is highly resistant to acids, bases, and many organic solvents, making the funnel suitable for most laboratory chemicals.

How do I clean the PTFE stopcock?

Rinse the stopcock with warm water after each use and wipe with a lint‑free cloth. For stubborn residues, a mild solvent compatible with PTFE can be used, followed by thorough rinsing.

Is the funnel compatible with standard laboratory clamps?

The funnel’s smooth glass surface and uniform dimensions allow it to be securely held by most standard ring clamps and retort stands.

What is the warranty period for this product?

EISCO provides a one‑year limited warranty covering manufacturing defects in the glass and stopcock components.

Can I purchase replacement stopcocks separately?

Yes. Replacement PTFE key stopcocks are available through EISCO’s authorized distributors and can be ordered using the product model number CH0470D.