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  3. KONTES KIMBLE KIMAX 926400-500

KONTES KIMBLE KIMAX 926400-500 Glass Volume Vacuum Trap 500ML 40/35 Flask 926402-500

926402-500 Kontes Kimble Kimax 926400-500 Glass 500ml 40/35 Large Volume Vacuum Trap Flask

( Brand: Kontes Kimble Kimax ), ( Manufacturer Part Number: 926400-500 ), ( Part Type: Vacuum Trap ), ( Intended Use/discipline: Biological Laboratory ), ( Unit Type: Unit ), ( Country Of Origin: United States ), ( Additional Information: Surplus Laboratory Consumable Supplies )

Review KONTES KIMBLE KIMAX Glass 500ml 40/35 Large Volume Vacuum Trap Flask

The **Kontes Kimble Kimax 926400-500 and 926402-500 glass vacuum trap flasks** are precision-engineered laboratory glassware components designed for high-performance vacuum distillation, solvent recovery, and other demanding chemical processes. Crafted from durable **borosilicate glass (Type 3.3, Kimble Kimax brand)**, these flasks are engineered to withstand extreme temperature fluctuations, aggressive solvents, and repeated exposure to vacuum pressures without compromising structural integrity or chemical resistance. The **500 mL capacity** provides an optimal balance between efficiency and workspace, making them ideal for medium-scale laboratory operations where precise control over distillation or solvent trapping is essential. The **40/35 standard taper joint** ensures a secure, leak-proof connection to compatible glassware, including condensers, adapters, and other vacuum apparatus, while the **vacuum trap design** with its distinctive bulbous chamber facilitates efficient condensation and collection of volatile solvents or distillates, minimizing loss and maximizing yield. The **smooth, polished glass surface** reduces dead zones where residues might accumulate, promoting cleaner operations and easier cleaning, while the **reinforced base** enhances stability during high-vacuum applications. Whether used in organic synthesis, pharmaceutical development, or analytical chemistry, these flasks deliver reliability and performance, making them a staple in laboratories where precision and durability are non-negotiable. Their compatibility with standard laboratory glassware systems further ensures seamless integration into existing setups, offering both versatility and long-term usability.

### **Pros and Cons of buying a Kontes Kimble Kimax 926400-500 (500 mL, 40/35 Volume Vacuum Trap Flask) and 926402-500 (Vacuum Stopcock)**

#### **Pros:**

1. **High-Quality Borosilicate Glass (Type 3.3 or 1)**

- The Kimble Kimax line is known for its durable, chemically resistant borosilicate glass, which is resistant to thermal shock and most laboratory solvents. This makes it suitable for a wide range of applications, including vacuum distillation, trapping volatile compounds, and general glassware use.

2. **Standardized 40/35 Joint Compatibility**

- The 40/35 joint is a widely used standard in laboratory glassware, ensuring compatibility with other vacuum systems, condensers, adapters, and stopcocks. This makes it easy to integrate into existing setups without needing custom fittings.

3. **Vacuum-Suitable Design**

- The flask is specifically designed for vacuum applications, meaning it can handle low-pressure environments without collapsing or leaking. This is critical for processes like rotary evaporation, distillation under reduced pressure, or trapping gases/volatiles.

4. **Durability and Longevity**

- Borosilicate glass is less prone to cracking or breaking compared to soda-lime glass, making this flask a long-term investment for frequent use in demanding lab conditions.

5. **Compatibility with Vacuum Stopcock (926402-500)**

- The stopcock (926402-500) is designed to fit securely on the 40/35 joint, allowing precise control of vacuum flow. This is useful for trapping or releasing gases slowly without exposing the system to atmospheric pressure abruptly.

6. **Wide Application Range**

- Suitable for organic synthesis, analytical chemistry, vacuum filtration, and other processes requiring controlled vacuum conditions. The 500 mL size offers a good balance between capacity and bench space.

7. **Brand Reputation (Kimble Kontes)**

- Kontes is a trusted name in laboratory glassware, known for reliability, precision, and adherence to industry standards. Their products are commonly used in academic, industrial, and research settings.

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#### **Cons:**

1. **Cost**

- High-quality borosilicate glassware is more expensive than standard soda-lime glass. While this is an investment, it may be prohibitive for small labs or individual researchers on tight budgets. Prices can vary, but expect to pay significantly more than generic glassware.

2. **Fragility Despite Durability**

- Although borosilicate glass is more resistant to thermal shock and chemicals than soda-lime glass, it is still fragile. Dropping or mishandling can still cause breakage, especially if the glass is thin or if it strikes a hard surface.

3. **Maintenance and Cleaning**

- Glassware requires thorough cleaning after use, particularly if it has been exposed to corrosive chemicals or residues. Contaminants like oils, organic solvents, or salts can be difficult to remove and may require specialized cleaning agents or ultrasonic baths.

4. **Potential for Leaks at Joints**

- Over time, the 40/35 joint or stopcock may develop minor leaks if not properly lubricated (with high-vacuum grease or silicone grease) or if the rubber gaskets wear out. Regular inspection and maintenance are necessary to ensure a tight seal.

5. **Limited Color Options**

- Like most laboratory glassware, this flask is clear, which is standard for visibility. However, if you need colored glass (e.g., amber for light-sensitive compounds), you would need to source a different product.

6. **Replacement Parts Dependency**

- If the stopcock or joint becomes damaged, replacement parts may be required. While Kontes offers compatible parts, they may not always be readily available from third-party suppliers, potentially causing delays.

7. **Space and Storage Requirements**

- Glassware takes up space, especially when stored properly (e.g., in racks or protected from dust). Labs with limited storage may find it challenging to house multiple pieces of this size.

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### **Conclusion:**

The **Kontes Kimble Kimax 926400-500 (500 mL vacuum trap flask) and 926402-500 (vacuum stopcock)** is a high-quality, reliable choice for laboratories requiring durable, vacuum-compatible glassware. Its borosilicate construction, standardized joint, and compatibility with vacuum systems make it ideal for applications like distillation, trapping, and filtration under reduced pressure. However, the higher cost, potential fragility, and maintenance requirements should be considered before purchasing.

For researchers or labs with frequent vacuum operations and a need for long-term durability, this flask is a strong recommendation. For budget-conscious users or those with less demanding applications, alternatives like lower-cost borosilicate glassware or plastic alternatives (where applicable) might be considered. Always ensure proper handling, cleaning, and storage to maximize the lifespan of the equipment.

### **Recommendation:** **Buy if:**

- You need a durable, vacuum-compatible flask for routine use in organic synthesis, distillation, or trapping applications.

- Your lab prioritizes quality and longevity over cost savings.

- You have access to proper lubrication (e.g., high-vacuum grease) and storage for the glassware.

**Avoid if:**

- Your budget is extremely limited, and you can find equally effective alternatives at a lower cost.

- You lack experience handling fragile glassware or maintaining vacuum systems.

- Your applications do not require the specific features of borosilicate glass (e.g., if you only need occasional use).

Details:

See pictures for details. GSR veers 1730 GS 9.9.4 1730 Used item in great condition. Little to no signs of use. No chips or cracks throughout.

part #: 926400500 price

  • $38.49

specifications plasticwarelabsuppy:

  • brand: Kontes Kimble Kimax
  • mpn: 926400-500
  • part type: Vacuum Trap
  • intended use/discipline: Biological Laboratory
  • unit type: Unit
  • country of origin: United States
  • additional information: Surplus Laboratory Consumable Supplies

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  • started: February 14, 2026
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part type: vacuum trap, intended use/discipline: biological laboratory, unit type: unit, country of origin: united states, additional information: surplus laboratory consumable supplies,
category: business & industrial > medical, lab dental supplies > glassware plasticware > medical lab glassware, sku: 13291310676534633,
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