KONTES KIMBLE KIMAX 26283 Glass Angled Round Bottom Boiling 500ML 3-NECK 19/22 Flask

( Brand: Kontes Kimble Kimax ), ( Manufacturer Part Number: 26283 ), ( Intended Use/discipline: Biological Laboratory, Dental Laboratory, Medical Laboratory, Microbiological Laboratory, Physical Laboratory ), ( Unit Type: Unit ), ( Country Of Origin: United States ), ( Additional Information: Surplus Laboratory Consumable Supplies )

Review KONTES KIMBLE KIMAX Glass 500ml Angled 19/22 Round Bottom Boiling Flask

The **Kontes Kimble Kimax 26283 500 mL Angled 3-Neck Round Bottom Boiling Flask** is a precision-engineered glassware essential for laboratories requiring versatility, durability, and optimal performance in a wide range of chemical and analytical procedures. Crafted from high-quality borosilicate glass (Type I, Kimble brand), this flask is designed to withstand extreme thermal shock, chemical resistance, and prolonged exposure to high temperatures, making it ideal for applications such as distillation, reflux, extraction, and synthesis. Its **angled 3-neck configuration** provides a compact yet efficient design, allowing for the simultaneous attachment of multiple accessories such as condensers, addition funnels, thermometers, or stirrers without sacrificing workspace or compromising functionality. The **19/22 standard ground glass joints** ensure a secure, leak-proof seal, reducing the risk of contamination or spillage during demanding experiments, while the **500 mL capacity** strikes a balance between scalability and maneuverability, accommodating medium-sized reactions while remaining easy to handle.

The flask s **round bottom geometry** enhances heat distribution and minimizes hot spots, promoting even boiling and reducing the likelihood of superheating or bumping during distillation or reflux operations. The **angled necks** further optimize space utilization in crowded laboratory setups, making it particularly advantageous in teaching labs, pharmaceutical research, or industrial-scale synthesis where efficiency is paramount. Constructed to meet rigorous industry standards, this flask is free from alkali or heavy metal impurities, ensuring purity and reliability in sensitive applications such as organic synthesis, biochemistry, or analytical chemistry. Its **durable borosilicate glass** resists thermal expansion and contraction, maintaining structural integrity even when subjected to rapid temperature fluctuations, while its smooth, polished interior minimizes adsorption of reactive substances, preserving the integrity of experimental outcomes. Whether used in routine laboratory procedures or advanced research, the Kontes Kimble Kimax 26283 flask exemplifies precision, reliability, and adaptability, making it an indispensable tool for scientists and technicians demanding the highest standards of performance.

### **Pros and Cons of buying a Kontes Kimble Kimax 26283 Glass 500 mL Angled 3-Neck Round Bottom Boiling Flask**

1. **High-Quality Glass Construction** Made from borosilicate glass (likely Kimble Kimax, a durable borosilicate type), this flask is resistant to thermal shock, chemical corrosion, and mechanical stress, making it suitable for laboratory applications requiring precision and longevity.

2. **Angled Design** The angled necks improve visibility and accessibility, allowing for better observation of reactions and easier attachment of glassware (e.g., condensers, addition funnels) without excessive crowding.

3. **Three-Necked Configuration** The three necks provide flexibility for mounting multiple accessories simultaneously, such as a reflux condenser, thermometer well, and addition funnel, which is essential for complex reactions (e.g., distillation, extraction, or multi-step syntheses).

4. **Standard Ground Glass Joints (19/22 mm)** Compatible with a wide range of laboratory glassware, ensuring easy interchangeability with other equipment like adapters, clamps, or reaction vessels.

5. **Durability and Reusability** Borosilicate glass is known for its resistance to thermal cycling and chemical resistance, reducing the need for frequent replacements and lowering long-term costs.

6. **Compatibility with Standard Lab Equipment** Works seamlessly with clamps, heating mantles, magnetic stirrers, and other common lab setups, making it versatile for various experiments.

7. **Brand Reputation** Kontes (a subsidiary of Thermo Fisher Scientific) is a trusted manufacturer in laboratory glassware, known for reliability and adherence to industry standards.

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1. **Cost** High-quality borosilicate glassware is more expensive than plastic or lower-grade glass alternatives. The price may be prohibitive for small-scale or non-professional users.

2. **Fragility Despite Durability** While borosilicate glass is tougher than soda-lime glass, it can still shatter if subjected to sudden impacts, extreme temperature changes, or improper handling. Care must be taken during use and cleaning.

3. **Maintenance Requirements** Glassware requires thorough cleaning (often with detergents or solvents) to prevent residue buildup, which can interfere with reactions. Improper cleaning may also damage the ground joints over time.

4. **Weight** The glass flask is heavier than plastic alternatives, which can make handling and transportation more cumbersome, especially in large quantities or for mobile setups.

5. **Limited Flexibility for Non-Standard Setups** The fixed 19/22 mm joints may not accommodate non-standard or proprietary lab equipment, requiring additional adapters or custom fittings.

6. **Potential for Joint Wear** Over time, the ground glass joints may wear down, especially if frequently assembled/disassembled, leading to leaks or reduced sealing efficiency. This may require periodic replacement of joints or the entire flask.

7. **Not Ideal for High-Pressure Applications** While suitable for most lab reactions, the standard borosilicate flask is not designed for high-pressure environments (e.g., autoclaves or sealed systems under significant pressure).

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The **Kontes Kimble Kimax 26283 500 mL angled 3-neck round bottom flask** is an excellent investment for **serious laboratory work**, particularly in chemistry, biochemistry, or pharmaceutical research. Its borosilicate construction, angled design, and multi-neck configuration make it highly versatile for reactions requiring precise control, visibility, and the ability to mount multiple accessories. The durability and compatibility with standard lab equipment justify its cost for professional or academic settings.

However, for **budget-conscious users, hobbyists, or applications where extreme durability is unnecessary**, cheaper alternatives (e.g., plastic flasks or lower-grade glass) may suffice. If you prioritize **cost savings, portability, or non-reactive environments**, these alternatives could be preferable. That said, if you require **reliability, chemical resistance, and long-term use**, this flask is a strong recommendation.

- You are a **professional chemist, student, or researcher** working with reactions that demand precision, thermal stability, and multi-neck functionality.

- You need **long-term durability** and are willing to invest in high-quality glassware.

- Your lab setup frequently requires **simultaneous attachment of condensers, thermometers, or addition funnels**.

- You are on a **tight budget** and can use lower-cost glassware or plastic for your needs.

- Your applications do not require **high thermal resistance** (e.g., non-reactive or low-temperature experiments).

- You prioritize **portability or ease of handling** over glass durability.

For most **serious laboratory users**, this flask is a worthwhile purchase due to its balance of performance, reliability, and versatility.

Details:

GSR veers 1730 GS 9.9.4 1730 Used item in good condition. Please see pictures for details. Neck joint lip has chips around inside. Some residue or staining.

part #: 26283 prices

• $139.99-$174.99

specifications plasticwarelabsuppy:

• brand: Kontes Kimble Kimax
• mpn: 26283
• intended use/discipline: Biological Laboratory, Dental Laboratory, Medical Laboratory, Microbiological Laboratory, Physical Laboratory
• unit type: Unit
• country of origin: United States
• additional information: Surplus Laboratory Consumable Supplies

offer plasticwarelabsuppy:

• availability: In Stock
• started: February 13, 2026
• sold: 0
• options: Ship-to-home
• quantity: 1

general plasticwarelabsuppy:

• condition: Used
• Medical, Lab Dental Supplies > Glassware Plasticware > Other Medical Lab Glassware

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• # reviews: 7419
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