Borosilicate Filter Funnel

Product Code : SCL-LG-11997

The Borosilicate Filter Funnel is a conical, heavy-walled laboratory vessel used for channeling liquids into narrow-necked containers and separating solids from liquid solutions using filter paper. Engineered for laboratory technicians, research scientists, and academic educators, this high-durability laboratory funnel delivers exceptional chemical resistance and thermal stability during intensive filtration processes.

Product Description

The Borosilicate Filter Funnel from Science Lab Supplies is meticulously crafted to meet the strict demands of modern analytical laboratories. Fabricated from low-expansion Borosilicate 3.3 glass, this funnel exhibits superior resistance to thermal shock and chemical corrosion. The design features a precise 60-degree cone angle, ensuring a perfect fit for standard folded filter papers, which maximizes filtration speed and efficiency.

Featuring a durable short stem, this premium glass funnel reduces the risk of clogging and accidental breakage during rapid liquid transfers. It serves as a foundational component in analytical chemistry, gravity filtration setups, and vacuum filtration systems. By replacing easily degraded plastics, this reusable laboratory glassware item offers research facilities and universities a reliable, cost-effective, and long-lasting tool for everyday fluid management.

Key Features

• Borosilicate 3.3 Composition: Manufactured from high-purity glass ensuring maximum resistance to corrosive acids, alkalis, and organic solvents.
• Optimized Conical Angle: Designed with a precise 60° internal cone angle to ensure rapid liquid flow and excellent filter paper alignment.
• Thermal Shock Resistance: Safely handles boiling liquids and undergoes repeated autoclave sterilization cycles up to 140°C without cracking.
• Heavy-Wall Construction: Reinforced rims and heavy-duty glass walls provide enhanced mechanical strength and long-term durability.
• Short Stem Design: Features a robust, uniform stem that accelerates fluid discharge while minimizing the risk of accidental breakage.
• High Optical Transparency: Completely clear glass allows technicians to visually monitor fluid movement and check for potential particulate blockages.

Technical Specifications

What's Included in the Kit

• 4 x Borosilicate Filter Funnel (Short Stem)
• 1 x Specialized Cleaning Brush for Funnel Stems
• 1 x Scientific Filtration User Guide

Applications / Uses

• Separating solid precipitates from liquid solutions in qualitative and quantitative analytical chemistry.
• Pouring hot or highly corrosive reagents safely into volumetric flasks and narrow burettes.
• Integrating seamlessly with specialized filtration apparatus for vacuum-assisted separation setups.
• Serving as a fundamental, durable piece of glass hardware inside advanced high school and university science kits.
• Clarifying botanical extracts and essential oils in organic chemistry synthesis workflows.

How to Use the Borosilicate Filter Funnel

1. Clean the funnel thoroughly and check the glass rim and stem for any structural micro-cracks before assembling.
2. Place the short stem securely into the neck of a receiving flask, using a rubber adapter if configuring a vacuum line.
3. Fold a standard circle of laboratory filter paper into a quadrant shape and seat it snugly within the 60-degree glass cone.
4. Moisten the filter paper with a small volume of distilled water or pure solvent to create a tight seal against the glass wall.
5. Pour the target mixture slowly down a glass stirring rod into the center of the paper, keeping the liquid level below the paper's top edge.

Handling Note: Do not drop heavy objects or force oversized mechanical brushes into the narrow stem to avoid accidental stress fractures.

Care & Maintenance

• Prompt Washing: Clean the funnel with a mild, non-scratching detergent immediately after use to prevent stubborn chemical deposits from drying inside the stem.
• Proper Stem Flushing: Use a narrow, soft-bristle brush to completely clear away particulate matter trapped inside the internal bore.
• Safe Handling and Storage: Place the dried funnels horizontally inside padded drawers or securely upright on specialized laboratory glassware racks to prevent rolling and chipping.

Why Choose Science Lab Supplies

Science Lab Supplies stands out as an industry-leading global manufacturer and exporter of precision laboratory equipment and educational kits. Drawing upon decades of specialized production experience, we engineer high-performance glassware that complies strictly with international safety and durability benchmarks. Our extensive logistics network enables highly efficient global supply capabilities to reliably fulfill large orders for commercial research labs, testing centers, and academic institutions. In addition to our premium glass components, we offer an expansive array of durable laboratory plasticware to accommodate diverse laboratory configurations.

Frequently Asked Questions

What is a Borosilicate Filter Funnel used for?

A Borosilicate Filter Funnel is used to safely pour liquids into narrow-mouthed containers and to perform gravity or vacuum filtration when paired with standard filter paper. It effectively separates suspended solid particulates from liquid mixtures.

What material is it made of?

It is constructed entirely from high-grade Borosilicate 3.3 glass, providing excellent mechanical strength, low thermal expansion coefficients, and superb chemical resistance.

Can this filter funnel withstand high temperatures?

Yes, the borosilicate glass composition allows the funnel to safely handle boiling chemical mixtures and undergo standard laboratory autoclave sterilization up to 140°C.

What is the benefit of a 60-degree cone angle?

A precise 60-degree angle ensures that standard laboratory filter paper aligns perfectly flat against the inner glass walls, optimizing flow rate and preventing fluid bypass.

Can it be used for vacuum filtration setups?

Yes, its heavy-walled construction makes it strong enough to handle moderate vacuum pressure when fitted correctly into a filtering flask via a rubber stopper or adapter.

Review our full inventory of premium fluid separation tools by exploring our specialized laboratory glassware collection page to upgrade your research efficiency today.