CHEMGLASS CG-1506-20 Glass Round Bottom Single Neck Boiling 500ML 24/40 Flask

( Brand: Chemglass ), ( Manufacturer Part Number: CG-1506-20 ), ( Intended Use/discipline: Biological Laboratory, Dental Laboratory, Medical Laboratory, Microbiological Laboratory, Physical Laboratory ), ( Country Of Origin: United States ), ( Unit Type: Unit ), ( Additional Information: Surplus Laboratory Consumable Supplies )

Review CHEMGLASS Glass 500ml 24/40 Round Bottom Single Neck Boiling Flask #2

The **Chemglass CG-1506-20 500 mL 24/40 Round Bottom Single-Neck Boiling Flask** is a precision-engineered laboratory glassware essential for a wide range of chemical synthesis, distillation, and reaction applications. Crafted from high-quality borosilicate glass (Type 1, conforming to ASTM E438 and USP Class A standards), this flask is designed to withstand extreme thermal and chemical stresses, ensuring durability and reliability in both routine and demanding laboratory environments. Its **500 mL capacity** strikes an ideal balance between versatility and space efficiency, making it suitable for small-scale reactions, reflux setups, or preliminary experiments where precise volume control is critical. The **24/40 standard taper joint** facilitates seamless compatibility with a vast array of glassware accessories, including condensers, adapters, and ground-glass joints, allowing for flexible and secure connections without the risk of leaks or contamination. The **single-neck design** simplifies assembly while maintaining functionality, making it an excellent choice for straightforward distillation, heating, or stirring applications.

The flask s **round bottom geometry** enhances heat distribution during heating, reducing hot spots and minimizing thermal shock, which is particularly advantageous when using heating mantles, oil baths, or direct flame sources. Its smooth, polished interior minimizes residue buildup and ensures easy cleaning, while the reinforced base provides stability during vigorous agitation or reflux operations. The **thick-walled construction** offers superior resistance to pressure fluctuations, making it ideal for low-pressure or vacuum applications where standard glassware might fail. Additionally, the flask s **clear, transparent borosilicate glass** allows for real-time visual monitoring of reactions, enabling operators to track color changes, phase separations, or the progress of precipitation without interruption. Whether used in academic research, pharmaceutical development, or industrial synthesis, this flask exemplifies reliability and precision, embodying the high standards expected in modern laboratory glassware. Its robust design and compatibility with standard laboratory equipment make it an indispensable tool for chemists seeking both efficiency and safety in their experimental workflows.

**Pros and Cons of buying a Chemglass CG-1506-20 Glass 500ml 24/40 Round Bottom Single Neck Boiling Flask**

### **Pros**

1. **Durability and Chemical Resistance** Made from borosilicate glass (likely Type I or III), this flask is highly resistant to thermal shock, corrosion, and most common laboratory chemicals. This ensures longevity and reliability in demanding applications.

2. **Standardized Joint Compatibility** The 24/40 joint is a widely accepted standard in laboratory glassware, making it compatible with a vast array of adapters, condensers, and other glassware components. This flexibility simplifies setup for various experiments.

3. **Precision and Clarity** The clear borosilicate glass allows for easy visualization of reactions, color changes, or contamination, which is critical for monitoring processes in real time.

4. **Heat Resistance** The material can withstand high temperatures, making it suitable for heating under reflux, distillation, or other heat-intensive procedures without warping or breaking.

5. **Sterility and Cleanliness** Glass is inherently non-porous and easy to clean, reducing the risk of microbial contamination or residue buildup compared to plastic alternatives.

6. **Compatibility with Vacuum Systems** The robust construction allows it to be used in vacuum applications, such as rotary evaporation or filtration under reduced pressure.

7. **Brand Reputation** Chemglass is a well-established manufacturer known for producing high-quality, precision glassware, which often comes with warranties or guarantees against defects.

8. **Versatility** The single-neck design is adaptable for various applications, including boiling, stirring, or attaching simple apparatuses like addition funnels or thermometers.

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### **Cons**

1. **Fragility** Despite its durability, glass is still brittle and can shatter if dropped or subjected to sudden impacts. This poses a risk of injury and potential contamination if broken during use.

2. **Weight** Borosilicate glass is heavier than plastic alternatives, which can make handling cumbersome, especially for larger flasks or when working in a lab with limited space.

3. **Cost** High-quality borosilicate glassware is more expensive than plastic or lower-grade glass options. For one-time or low-budget experiments, this may not be justified.

4. **Maintenance and Cleaning** While easy to clean, borosilicate glass can be more difficult to scrub thoroughly if residues (e.g., organic polymers or stubborn salts) are present. Ultrasonic cleaners or specialized detergents may be required.

5. **Limited Flexibility for Complex Setups** If the experiment requires multiple ports or specialized connections, a single-neck flask may require additional adapters or modifications, which can complicate assembly.

6. **Potential for Contamination** If not properly cleaned or stored, glassware can harbor residues from previous experiments, leading to cross-contamination in sensitive applications (e.g., pharmaceutical or analytical chemistry).

7. **Not Ideal for High-Pressure Applications** While it can handle vacuum, borosilicate glass is not designed for high-pressure environments, which may require specialized glass or metal alternatives.

8. **Replacement Parts Dependency** If the joint or neck becomes damaged, replacement parts may not always be readily available, especially for older or less common sizes.

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### **Conclusion**

The **Chemglass CG-1506-20 500ml 24/40 round bottom single-neck boiling flask** is an excellent choice for most laboratory applications requiring durability, chemical resistance, and compatibility with standard glassware. Its borosilicate construction ensures reliability in heating, reflux, and distillation processes, while the 24/40 joint offers unmatched versatility. However, its fragility, higher cost, and maintenance requirements may make it less suitable for casual or high-risk environments where plastic or disposable alternatives could suffice.

For **routine organic synthesis, undergraduate teaching labs, or general-purpose glassware needs**, this flask is highly recommended due to its balance of quality and functionality. If working with **highly corrosive substances, extreme pressures, or in environments where safety is a primary concern**, consider complementary protective measures (e.g., fume hoods, protective gear) or alternative materials (e.g., PTFE-lined flasks for extreme conditions).

Purchase this flask if you need a **reliable, long-term investment** for standard laboratory procedures involving heating, reflux, or distillation. If budget or safety constraints are a concern, weigh the pros and cons carefully especially regarding fragility and cost before committing. For one-off experiments or non-critical applications, a lower-cost alternative (e.g., plastic or lower-grade glass) may be more practical. Always prioritize proper handling and storage to maximize the flask s lifespan.

Details:

Item has two chips along inside of joint lip. See pictures for details. Minor signs of use. No other cracks or chips throughout.

GSR veers 1730 GS 9.9.4 1730 Used item in fair condition.

part #: cg150620 prices

• $21.99-$59.00

specifications plasticwarelabsuppy:

• brand: Chemglass
• mpn: Cg-1506-20
• intended use/discipline: Biological Laboratory, Dental Laboratory, Medical Laboratory, Microbiological Laboratory, Physical Laboratory
• country of origin: United States
• unit type: Unit
• additional information: Surplus Laboratory Consumable Supplies

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• city: Cotati, California
• rating: 99.8%
• # reviews: 7377

offer plasticwarelabsuppy:

• options: Ship-to-home
• quantity: 1
• started: February 5, 2026
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general plasticwarelabsuppy:

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

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