Separatory funnels are essential tools in chemistry labs for liquid-liquid extraction and separation. Their design allows for the efficient separation of immiscible liquids based on density differences. Selecting the appropriate separatory funnel ensures accurate results and safe laboratory practices.
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Discover now our comparison of the best Lab Separatory Funnels. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Lab Separatory Funnels are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
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No. 1
QWORK 1000ml Heavy Wall Conical Separating Funnel with 24/29 Fitting and PTFE Stopcock + Laboratory...
- PRECISE SEPARATION: 1000 ml conical glass funnel with 24/29 joint for efficient liquid–liquid extraction.
- CLEAR STRUCTURE: Transparent borosilicate glass allows easy observation of phase layers during separation.
- STABLE SUPPORT: Metal stand with adjustable clamps secures funnel for steady experimental operation.
- FLEXIBLE SETUP: Two clamp sizes fit flasks and beakers of different diameters, suitable for titration or filtration.
- LAB USE ONLY: Designed for educational or laboratory projects; handle and clean glassware carefully.
No. 2
1000ml Plastic Pear-Shaped Separatory Funnel – Durable Labware with Stopcock and Graduations
- Premium Polypropylene: Durable, wear-resistant material ensures long-term lab use
- Temp & Chemical Resilience: Handles high/low temps, weak acids, and bases
- Efficient Separation: Pear shape and tapered bottom support smooth phase separation
- Precision Stopcock: Built-in valve allows accurate flow control with clear volume markings
- Versatile & Autoclavable: Ideal for experiments, reusable, and suitable for education & research
No. 4
Eisco Separatory Funnel, 500mL - Polypropylene Plastic - Ungraduated - PP Stopcock with PTFE Plug - Leak-Proof...
- SEPARATIONS || 500mL Separatory Funnel for separating two immiscible liquids such as water and oil, or for "washing" compounds or mixtures with solvents to remove impurities. Funnel measures approximately 13" tall, and 4" in diameter (at widest point...
- INDUSTRIAL QUALITY POLYPROPYLENE PLASTIC || Made of premium-quality polypropylene plastic, with superior optical clarity, chemical durability, and heat tolerance. Can withstand temperatures up to 135°C. Autoclave, microwave and dishwasher safe. Excellent...
- PRECISE DISPENSING CONTROL || Features a polypropylene key stopcock fitted with a self-lubricating PTFE plug push-fitted to the stem of the funnel for easy and precise flow control during separation procedures
- LEAK PROOF CAP || Includes a leak-proof threaded screw cap for protecting contents
- GREAT FOR PROFESSIONAL LABORATORIES, CLASSROOMS & HOUSEHOLD || Designed for use in professional laboratories, but is an ideal choice for science classrooms and household use
No. 5
QWORK 1000ml Separating Funnel with 24/29 Joints and PTFE Plug
- Capacity - This separating funnel is 1000ml with Standard taper clamp for joints 24/29
- Design - Conical design ensures efficient separation.
- Material - Made of premium glass, the separating Funnel is clear and easy to wash.
- Usage - Glass separatory funnel for separating liquids with different densities
No. 6
Borosilicate Glass 1000ML Separating Funnel Heavy Wall Conical Separatory Funnel with 24/40 Joints and PTFE...
- 1000 mL Separatory funnel
- 1000mL glass separatory funnel for separating liquids with different densities
- Made of high quality glass
- Conical design ensures efficient separation
- Ensures High quality and premium customer service
No. 7
QWORK Separating Funnel with 24/29 Joints and PTFE Plug, 250ml
- Capacity - This separating funnel is 250ml with Standard taper clamp for joints 24/29
- Design - Conical design ensures efficient separation.
- Material - Made of premium glass, the separating Funnel is clear and easy to wash.
- Usage - Glass separatory funnel for separating liquids with different densities.
No. 8
QWORK 125ml Separating Funnel with 19/26 Joints and PTFE Plug, 1 Pack
- Capacity - This separating funnel is 125ml with Standard taper clamp for joints 19/26.
- Design - Conical design ensures efficient separation.
- Material - Made of premium glass, the separating Funnel is clear and easy to wash.
- Usage - Glass separatory funnel for separating liquids with different densities.
No. 9
QWORK 1000ml Separating Funnel with 24/29 Joints and Stopcock
- Capacity - This separating funnel is 1000ml with Standard taper clamp for joints 24/29.
- Design - Conical design ensures efficient separation.
- Material - Made of premium glass, the separating Funnel is clear and easy to wash.
- Usage - Glass separatory funnel for separating liquids with different densities.
No. 10
2pcs Lab Borosilicate Glass 250ML Separating Funnel Heavy Wall Conical Separatory Funnel with 24/40 Joints and...
- Borosilicate glass construction: This funnel is made from high-quality borosilicate glass, which is known for its exceptional heat resistance and durability. It can withstand temperatures ranging from -20°C to 150°C, making it suitable for various...
- Heavy wall design: The funnel features a thick wall construction, providing increased strength and stability. It is less likely to break or deform compared to regular glass funnels, ensuring a longer lifespan and reducing the risk of accidents.
- 24/29 joints: The funnel has 24/29 joints,The joints are securely attached and provide a leak-proof seal, preventing any spills or leaks during transportation or storage.
- Glass stopcock: The funnel comes with a glass stopcock, which allows for precise control over the flow of liquids. The stopcock is easy to operate and can be locked in place to prevent accidental removal during use.
- Ergonomic design: The funnel has an ergonomic design, providing a comfortable grip and reducing hand fatigue during prolonged use. The curved shape of the funnel also facilitates easy pouring and prevents liquid spillage.
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Last update on 2026-04-22 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Lab Separatory Funnels
Types of Separatory Funnels
There are several common types of separatory funnels, each suited for different applications.- Bulb Separatory Funnels: These have a bulbous bottom and are ideal for general-purpose separation where precise control isn't paramount.
- Cylindrical Separatory Funnels: Featuring a straight, cylindrical body, these offer better drainage and are suitable for more routine extractions.
- Pressure-Rated Separatory Funnels: Designed to withstand elevated pressures, these are used in specific applications like reactions under pressure or when dealing with volatile solvents.
- Pressure-Equalizing Separatory Funnels: These have two pressure-equalizing side arms to maintain atmospheric pressure within the funnel, crucial for preventing pressure buildup during extractions.
Material Considerations
The material of the separatory funnel impacts its chemical resistance, durability, and visibility.- Glass: Borosilicate glass is the most common material, offering excellent chemical resistance and clarity. It's suitable for most organic and inorganic solvents.
- Plastic: PTFE (Polytetrafluoroethylene) or polypropylene funnels are highly resistant to strong acids and bases, making them ideal for corrosive applications. However, they may have lower clarity than glass.
Size and Capacity
Separatory funnels come in various sizes, typically ranging from 50 mL to 2000 mL or more. The capacity you choose should align with the volume of liquids you typically process. Smaller funnels are convenient for microscale work, while larger ones are necessary for bulk extractions. It's often beneficial to have a few different sizes on hand for versatility.Stopcock Type
The stopcock is the valve at the bottom of the funnel that controls the flow of liquid.- Glass Stopcocks: Traditional and common, they offer good chemical resistance but require lubrication with grease to prevent sticking and ensure a tight seal.
- PTFE Stopcocks: These are self-lubricating, chemically inert, and provide a drip-free seal. They are often preferred for their ease of use and maintenance, especially when working with reactive substances.
Comparison Tips
When comparing separatory funnels, consider the specific chemicals you will be working with to ensure material compatibility. Evaluate the required precision for your separations; pressure-rated or pressure-equalizing models may be necessary for certain experiments. Check the ease of cleaning and maintenance, particularly regarding the stopcock type. The intended scale of your work will dictate the appropriate size.Frequently Asked Questions
What is a separatory funnel used for?
A separatory funnel is a piece of laboratory glassware used in liquid-liquid extractions to separate immiscible liquids. It relies on the density difference between the two liquids to allow them to settle into distinct layers.
What are the common materials for separatory funnels?
The most common materials are borosilicate glass for general use and PTFE (Teflon) or polypropylene for applications involving strong acids, bases, or corrosive substances. Glass offers better visibility, while plastic provides superior chemical resistance.
How do I choose the right size separatory funnel?
The size, or capacity, of the separatory funnel should be chosen based on the volume of liquids you typically need to separate. It's advisable to select a funnel that can accommodate at least twice the volume of the largest layer you anticipate working with.
What is the difference between a glass stopcock and a PTFE stopcock?
Glass stopcocks require lubrication with stopcock grease to ensure smooth operation and prevent leaks, but can seize if not maintained. PTFE stopcocks are self-lubricating, highly chemical resistant, and typically provide a drip-free seal with less maintenance.
Are pressure-rated separatory funnels necessary for standard lab work?
Pressure-rated separatory funnels are typically not needed for standard laboratory extractions conducted at atmospheric pressure. They are used in specialized applications where reactions are performed under elevated pressure or when volatile solvents could generate significant vapor pressure.
How should I clean a separatory funnel?
Cleanliness is crucial for accurate separations. Wash the funnel with appropriate laboratory detergent and rinse thoroughly with distilled or deionized water. Ensure the stopcock is clean and properly lubricated if it's a glass type.
