Choosing the correct lab addition funnel is crucial for ensuring precision, safety, and the integrity of your experimental results. The right funnel facilitates controlled reagent delivery, prevents unwanted reactions, and maintains consistent conditions throughout your procedures. Carefully selecting equipment tailored to your specific laboratory needs enhances efficiency and accuracy in chemical synthesis and analytical work.
- Premium Material Construction: Made of high quality borosilicate glass, strong and durable with excellent corrosion resistance for long-lasting laboratory use
- Standard Laboratory Joint Size: Features 24/40 joint top and bottom with pressure equalizing design and cylindrical style equipped with PTFE stopcock
- Large Volume Capacity: 500ml capacity provides ample volume for various laboratory addition and dropping applications
- Professional Laboratory Equipment: Autoark provides high quality laboratory supplies and customer service for scientific and research needs
- Pressure Equalizing Design: The pressure equalizing feature ensures controlled and consistent liquid flow during chemical additions and reactions
- Borosilicate glass; maximum withstand temperature 250°C
- 24/40 joint top and bottom
- Capacity: 100 ml
- Cylindrical style with PTFE stopcock
- Warranty: if received damaged, please contact us immediately; we will solve it until satisfied
- Widely used for laboratory operations including stepwise reagent addition and precision titration experiments
- Clear volume graduations printed on funnel wall facilitate residual liquid monitoring and quantitative dispensing during procedures
- Integrated separate pressure equalization tube enables stable continuous liquid addition under constant pressure conditions
- Borosilicate glass construction withstands high temperatures and acid/base exposure, suitable for repeated reuse in laboratory reactions
- Warranty: 1-year coverage period for your peace of mind, if received damaged, please let us know and we will solve it promptly
- Constant pressure design for steady dropwise addition, used in laboratory synthetic processes that requires uniform speed and pressure liquid reactant addition
- Constructed with G3.3 borosilicate glass, heat-resistant, pressure-tolerant, and corrosion-resistant; excellent transparency for observing liquid status
- Equipped with 2 PTFE valves, with an independent stopcock on the equalizing tube for flexible switching between constant pressure and sealed modes
- 100 ml capacity, 24/40 standard ground joint; broad compatibility for easy connection with other standard joint glassware
- Warranty: 1-year coverage period for your peace of mind, if received damaged, please let us know and we will solve it promptly; important notice: always read the enclosed instructions before use; the manufacturer is not liable for damages caused by...
- Pressure Equalizing Addition Funnel is commonly used in general closed system experiments and experiments that require dripping solutions; it is mainly connected with reaction vessel to drop solution, which can isolate the air, prevent solvent from...
- Borosilicate glass; capacity: 50 ml with graduation
- 24/40 joint top and bottom
- Cylindrical style with PTFE stopcock
- StonyLab ensures high quality products and premium customer service; if received damaged, please contact us immediately; we will solve it until satisfied
- Borosilicate glass; maximum withstand temperature 250°C
- 24/40 joint top and bottom
- Capacity: 50 ml
- Cylindrical style with PTFE stopcock
- Warranty: if received damaged, please contact us immediately; we will solve it until satisfied
- Pressure Equalizing Addition Funnel is commonly used in general closed system experiments and experiments that require dripping solutions; it is mainly connected with reaction vessel to drop solution, which can isolate the air, prevent solvent from...
- Made of borosilicate 3.3 glass, resistant to pressure and chemical corrosion, ideal for routine lab applications
- Fitted with a PTFE stopcock and pressure equalizing tube for smooth and controlled reagent addition
- Cylindrical 500ml funnel with PTFE stopcock and 24/40 standard taper joints at both top and bottom, compatible with common lab glassware setups
- stonylab ensures premium products and premium customer service; if received damaged, please contact us immediately; we will solve it until satisfied
- stonylab addition funnel; Borosilicate glass laboratory glassware used to transfer liquids.
- Cylindrical design with PTFE stopcock allows controlled reagent transfer; useful for adding reagents slowly.
- Features 24/40 standard joints at top and bottom for secure instrument connections with other instruments.
- Capacity: 500 ml; precise scale, heavy-duty and reusable.
- Warranty: 1-year coverage period for your peace of mind, if received damaged, please let us know and we will solve it promptly.
- pressure equalizing addtion funnel used for adding chemical material 24/40 joints
- PERFECT FOR LAB: Made of Borosilicate Glass, the Glass Funnels have High chemical durability and low thermal expansion, which can withstand the temperature under 800 °C (~1500 °F)
- HEAVY DUTY: Reusable, environmental friendly, easy to clean, high temperature resistance, for laboratory, kitchen, science experiment, liquid
- 4 DIFFERENT SIZES: Our Glass Funnels come in 4 different sizes: 100 mm (170mm Length), 75 mm (130 mm Length), 50 mm (90 mm Length) & 40 mm (70 mm Length) Diameter
- VARIOUS & WONDERFUL DESIGN: Lab Glass Funnels come in 4 different sizes. All of them have round edges and smooth surface, which are your essential tools in doing an experiment
- SAFE GUARANTEE: Due to the glass material, this product may break during delivery. If you receive defective items, please let us know via email to get replacement items
This article is part of our complete guide Lab & Scientific Equipment — browse all our comparisons and buying guides.
Last update on 2026-08-24 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Lab Addition Funnels
Material and Durability Considerations
The material of your addition funnel directly impacts its chemical resistance, temperature tolerance, and overall lifespan. Borosilicate glass is a popular choice due to its excellent thermal shock resistance and inertness to most chemicals. However, for highly corrosive substances like hydrofluoric acid or strong bases, specialized plastics such as PTFE (polytetrafluoroethylene) or PFA (perfluoroalkoxy) might be preferred. Consider the types of reagents you will be handling and the operating temperatures to select a material that can withstand these conditions without degradation or contamination.
- Borosilicate Glass: Offers superior chemical resistance and thermal stability for most applications.
- PTFE/PFA: Ideal for corrosive chemicals and non-stick properties, but generally have lower temperature limits than glass.
- Polypropylene (PP): Economical for less demanding applications, but with limited chemical and temperature resistance.
Volume, Scale, and Graduations
Selecting the appropriate capacity is vital for accurate and safe additions. Addition funnels are available in a wide range of volumes, from a few milliliters for micro-scale synthesis to several liters for large-scale industrial processes. Ensure the funnel's capacity is sufficient for the entire volume of reagent you intend to add, with some headspace to prevent spills. Many funnels include clear, durable graduation marks, which are essential for monitoring the volume added and ensuring precise experimental control. Check that the graduations are easy to read and accurate for your specific requirements.
- Capacity: Match the funnel volume to your reaction scale, allowing for adequate headspace.
- Graduations: Look for clear, precise markings for accurate volume monitoring.
- Joint Size: Ensure the standard taper joint (e.g., 24/40, 19/22) matches your receiving flask.
Valve Type and Control Mechanism
The stopcock, or valve, is critical for controlling the flow rate of the added reagent. Two main types are prevalent: glass stopcocks and PTFE stopcocks. Glass stopcocks offer excellent chemical resistance but typically require lubrication (grease) to prevent seizing and ensure a leak-free seal, which can be a source of contamination. PTFE stopcocks, on the other hand, are self-lubricating, offer superior chemical resistance, and provide a consistently smooth and leak-free operation without the need for grease, making them ideal for sensitive applications or when cleanliness is paramount. Precision in flow control is paramount for successful reactions.
- Glass Stopcock: Durable, chemically resistant, but may require grease and careful handling.
- PTFE Stopcock: Grease-free, excellent chemical resistance, smooth operation, and reduced contamination risk.
Safety and Advanced Features
Consider features that enhance safety and experimental efficiency. Pressure-equalizing addition funnels are designed with an additional side arm that connects the top of the funnel to the receiving flask, preventing pressure buildup or vacuum formation during reagent addition. This ensures a steady, uninterrupted flow and prevents potential hazards. Funnels with standard taper joints provide secure connections to other glassware components, minimizing leaks and ensuring system integrity. Ease of cleaning is also a practical consideration, as proper cleaning prevents cross-contamination and prolongs the life of the equipment.
- Pressure Equalizing Arm: Essential for preventing pressure imbalances and ensuring a consistent flow.
- Standard Taper Joints: Ensures secure, leak-proof connections to reaction vessels.
- Ease of Cleaning: Smooth surfaces and simple designs facilitate thorough decontamination.
