Choosing the right 5000 ml round bottom flask is essential for reliable reactions, heating stability, and safe handling in the lab. This guide highlights five top options and compares key features to help you select a model that fits your budget, setup, and experimental needs. Each entry includes capacity, joint size, neck count, and material notes to support informed purchases for chemistry, synthesis, and research settings.
| Product Name | Brand | Joint / Neck | Material | Notes |
|---|---|---|---|---|
| 5L 24/40 Round Bottom Glass Flask 1-Neck | Deschem | 24/40, Single Neck | Borosilicate Glass | Standard boiling flask with 5 L capacity |
| Deschem 5000ml 24/40 2-Neck Round Bottom Flask | Deschem | 24/40, 2-Neck | Borosilicate Glass | Two necks for multiple connections |
| DONLAB FLK-01-5000 ASTM STD Glass 24/40 Joint Single Neck | DONLAB | 24/40, Single Neck | Standard Borosilicate Glass | ASTM standard grade |
| Labasics 5000ml 3 Neck Round Bottom Flask | Labasics | 24/40 Center and Side Standard Joint | Borosilicate Glass | Three-neck configuration |
| NANSHIN Glassware 5000ML 3 Neck Flask | Nanshin | 24/40, 3 Neck | Borosilicate Glass | Three-neck with robust construction |
Note: This selection focuses on common 24/40 joint size and 5000 ml capacity, suitable for diverse lab tasks such as synthesis, distillation, and reaction monitoring. The featured brands span Deschem, DONLAB, Labasics, and NANSHIN, offering options with single, two, or three necks to accommodate different apparatus configurations.
5L 24/40 Round Bottom Flask — Deschem
The Deschem 5L 24/40 round bottom flask features G3.3 borosilicate glass with an annealing point around 560°C and a linear expansion coefficient of 32×10-7/°C. This combination supports stable heating and thermal cycling, making it suitable for routine reactions and condensations. The single-neck design focuses on straightforward setups and is ideal for basic lab reactions that require a single connection to a condenser or drying tube. Users should ensure compatibility with their existing equipment and clamps for secure mounting.
Deschem 5000ml 24/40 2-Neck Round Bottom Flask
This Deschem model provides two 24/40 joints, enabling simultaneous connections for reflux, sampling, or multiple stirrer/sensors. Constructed from borosilicate glass, it balances durability with chemical resistance. Two necks help with organization in more complex reaction setups while maintaining a compact footprint. Consider this option when you anticipate adding accessories like condensers or gas inlets without crowding a single neck.
Deschem 5000ml 24/40 4-Neck Round Bottom Flask
This four-neck Deschem flask adds more ports for complex reaction systems, including additional sampling points, gas inlet/outlet, or multiple condensers. The flask is made of G3.3 borosilicate glass with the same favorable annealing temperature and expansion characteristics as the single- and two-neck variants, offering predictable thermal performance. Ensure proper clamping and neck arrangement to keep the setup tidy and safe during heating.
DONLAB 5000ml 24/40 Single Neck Flask
The DONLAB FLK-01-5000 offers ASTM-standard borosilicate glass with a 24/40 joint and a single neck. This model is suitable for standard boiling, reflux, and simple distillation tasks where a single connection is sufficient. Its straightforward design makes it a practical choice for teaching labs or routine synthetic procedures. Operators should verify compatibility with other glassware and ensure proper sealing and heating controls.
Labasics 5000ml 3 Neck Round Bottom Flask
The Labasics 5000 ml flask features three necks with 24/40 standard joints, offering flexible connection options for multiple reagents, sensors, or sampling lines. Borosilicate construction supports high-temperature use, and the triple-neck arrangement facilitates parallel operations within a single vessel. As with other multi-neck flasks, careful arrangement of implements and clamps helps prevent interference during vigorous heating or stirring.
NANSHIN 5000ML 3 Neck Flask
The NANSHIN 5000 ml, 3-neck flask combines robust borosilicate glass with three 24/40 joints. This configuration supports complex reaction networks and simultaneous operations such as reflux, sampling, and gas in/out connections. The wall thickness and material choice emphasize durability under typical lab heating and cooling cycles. Verify compatibility with your condenser and connectors to maximize efficiency and minimize space usage on the lab bench.
USA LAB 5000mL One Neck Flask
This 1-neck, 5 L flask from USA LAB emphasizes a balance of capacity and simplicity. Suitable for standard reactions and distillations, it is a reliable choice when minimal ports are needed and space is limited. Users should ensure compatible clamps and supports to maintain a stable setup during heating, especially when using condensers or adapters on the single neck.
uxcell Cork Stand For 1000ml-5000ml Flasks
This cork stand supports 1000 ml to 5000 ml round bottom flasks, including 5000 ml models, by providing a stable, heat-insulating base. The cork material offers elasticity and friction to minimize movement, while its insulation properties reduce direct heat transfer to the bench. While not a flask, a quality stand improves safety and workflow efficiency in busy lab environments.
Buying Guide: Key Purchase Considerations
- Joint size and neck count: Match the joint with your equipment (condensers, adapters, and sensors). Single, two, or three necks expand flexibility but require careful arrangement to avoid interference.
- Material quality: Look for G3.3 borosilicate or equivalent high-clarity glass with good annealing and low expansion to withstand heating and rapid temp changes.
- Capacity and geometry: 5000 ml is a standard large-capacity option; ensure the flask can handle your typical heating method (oil bath, heating mantle, or open flame) and the reaction volume.
- Thermal and chemical compatibility: Borosilicate glass provides broad chemical resistance; confirm compatibility with your solvents and reagents.
- Accessories and compatibility: Consider the availability of compatible clamps, stands, condensers, and adapters for multi-neck configurations.
- Standards and safety: ASTM or equivalent quality marks indicate consistent manufacturing; verify lab safety and handling requirements for large flasks.
- Budget and durability: Multi-neck flasks add cost but enable complex experiments. For teaching labs, reliability and ease of cleaning may be prioritized.
- Storage and workflow: Larger flasks require appropriate storage space and stable bench setups to prevent tipping or breakage during transfers.