CHEMGLASS CG-1576-02 Taper Jacketed Flask 125ML 3-NECK 24/40 14/20

( Brand: Chemglass ), ( Manufacturer Part Number: CG-1576-02 ), ( Intended Use/discipline: Biological Laboratory ), ( Unit Type: Unit ), ( Country Of Origin: United States ), ( Additional Information: Surplus Laboratory Consumable Supplies )

Review CHEMGLASS 125ml 24/40 14/20 European Taper Jacketed Flask #2

The **Chemglass CG-1576-02 125 mL Three-Neck Round Bottom Jacketed Flask** is a precision-engineered laboratory glassware component designed for versatile and efficient chemical synthesis, distillation, and reaction monitoring in both academic and industrial settings. Constructed from borosilicate glass (Type I), this flask exemplifies durability and chemical resistance, ensuring long-term reliability even under rigorous conditions involving strong acids, bases, or organic solvents. Its **125 mL capacity** strikes an ideal balance between scalability and workspace efficiency, making it suitable for small-to-medium batch processes, pilot studies, or teaching demonstrations where precise control over reaction conditions is paramount.

The flask features a **three-neck configuration**, each equipped with **24/40 standard taper joints** on two of the necks and a **14/20 taper joint** on the third, offering unparalleled flexibility for attaching a variety of accessories. The **24/40 joints** are universally compatible with condensers, addition funnels, thermometers, or stir bars, while the **14/20 joint** can accommodate specialized adapters, such as a reflux condenser, gas inlet/outlet, or a side-arm for vacuum or pressure applications. This modular design allows researchers to customize the setup for specific procedures, whether it s a simple reflux reaction, a distillation, or a multi-step synthesis requiring real-time monitoring.

A defining feature of this flask is its **double-walled jacketed design**, which enhances its utility for temperature-sensitive applications. The jacketed interior creates a controlled environment for heating or cooling via a circulating fluid (such as oil, water, or glycol), enabling precise temperature regulation critical for exothermic reactions, crystallization, or reactions requiring thermal gradients. This feature is particularly advantageous in applications where rapid heating or cooling is necessary, such as in Schlenk techniques, cryogenic work, or reactions involving temperature-sensitive reagents. The jacketed construction also minimizes heat loss, improving energy efficiency and reducing the risk of thermal gradients within the reaction mixture.

The **24/40 and 14/20 taper joints** adhere to rigorous industry standards, ensuring a secure, leak-proof seal when properly fitted with compatible ground glass joints or PTFE-coated adapters. This reliability is essential for maintaining reaction integrity, especially under vacuum or pressure conditions, where even minor leaks can compromise results. The flask s **round bottom design** promotes even heating and mixing, reducing the risk of hot spots or uneven reaction rates, while its **thick-walled construction** provides structural stability during agitation or mechanical stirring.

Beyond its technical specifications, the **Chemglass CG-1576-02** is engineered with practical considerations in mind. The **neck alignment and spacing** are optimized for ergonomic handling, allowing for easy attachment and detachment of accessories without excessive force. The **smooth, polished glass surface** resists corrosion and makes cleaning straightforward, whether by manual scrubbing or automated washing systems, ensuring consistent performance across repeated use. Additionally, the flask s **transparent borosilicate glass** allows for visual monitoring of reactions, enabling real-time adjustments to be made based on color changes, phase separation, or other observable phenomena.

Whether used in a teaching laboratory for demonstrating fundamental organic chemistry principles or in a research setting for advanced synthetic chemistry, this flask exemplifies the marriage of functionality and precision. Its **versatility, durability, and adaptability** make it an indispensable tool for chemists, students, and technicians alike, bridging the gap between theoretical experimentation and practical application. By integrating seamless compatibility with standard laboratory equipment and robust performance under varied conditions, the **Chemglass CG-1576-02** stands as a cornerstone of modern chemical research and education.

### **Pros and Cons of buying a Chemglass CG-1576-02 (125 mL 3-Neck 24/40/14/20 Taper Jacketed Flask)**

1. **Versatility** The three-neck design allows for simultaneous attachment of multiple accessories (e.g., condenser, thermometer, addition funnel, or stir bar) without sacrificing functionality. This is ideal for reactions requiring precise control of temperature, pressure, or reagent addition.

2. **Jacketed Design** The outer jacket enables temperature regulation via circulating fluids (e.g., water, oil, or coolant), making it suitable for exothermic or endothermic reactions. This feature is particularly useful in synthesis where temperature control is critical (e.g., reflux, cooling, or heating).

3. **Standard Tapers (24/40 and 14/20)** These are universal ground glass joints widely compatible with other glassware, adapters, and accessories from major manufacturers (e.g., Ace Glass, Kontes, or Kimble). This reduces the need for custom adapters and simplifies setup.

4. **Durability and Clarity** Chemglass products are known for their high-quality borosilicate glass (likely Type 1 or 3.3), which is resistant to thermal shock and chemical corrosion. The clear glass allows for easy monitoring of reactions.

5. **Compact Size (125 mL)** Suitable for small-scale laboratory work, teaching demonstrations, or pilot experiments where larger flasks would be impractical. The size balances capacity with ease of handling.

6. **Compatibility with Common Equipment** Works seamlessly with standard laboratory setups, including heating mantles, condensers, and stirring devices. The 24/40 joint is particularly versatile for condensers, while the 14/20 joint can accommodate smaller adapters or sensors.

7. **Brand Reputation** Chemglass is a trusted supplier in the laboratory glassware industry, offering reliable products with consistent quality. Their flasks are often used in academic and industrial settings.

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1. **Cost** High-quality glassware like this is more expensive than plastic or lower-grade glass alternatives. The jacketed design and multiple necks add to the price, making it a significant investment for small-scale or occasional use.

2. **Fragility** Despite being durable, borosilicate glass can still break if subjected to sudden thermal shock (e.g., placing a hot flask in cold water) or mechanical stress (e.g., dropping it). Careful handling is required.

3. **Maintenance and Cleaning** Glass joints and necks can accumulate residue from reactions, requiring thorough cleaning with solvents or strong detergents. Improper cleaning may lead to clogging or contamination in subsequent uses.

4. **Limited to Glass Systems** If your workflow involves frequent switching between glass and non-glass components (e.g., plastic tubing or metal fittings), the 24/40/14/20 joints may require additional adapters, adding complexity.

5. **Space Requirements** The three-neck design and jacketed outer shell make the flask bulkier than a simple round-bottom flask. Storage and setup may require more bench space.

6. **Potential for Leaks** Over time, ground glass joints can wear out or develop leaks, especially if not lubricated properly with high-vacuum grease or silicone paste. Regular inspection and maintenance are necessary.

7. **Not Ideal for High-Pressure Applications** While suitable for most laboratory reactions, this flask is not designed for high-pressure synthesis (e.g., microwave-assisted or sealed-tube reactions). Specialized equipment (e.g., Parr reactors) would be needed for such applications.

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The **Chemglass CG-1576-02 125 mL 3-neck 24/40/14/20 taper jacketed flask** is an excellent choice for laboratories requiring precise temperature control, multi-functional setups, or small-scale synthesis. Its versatility, durability, and compatibility with standard equipment make it a valuable tool for organic synthesis, teaching labs, or process development. However, the higher cost, maintenance requirements, and fragility may not justify its purchase for casual users or applications where simpler glassware (e.g., a single-neck round-bottom flask) would suffice.

- You need a flask for reactions requiring **temperature control** (e.g., reflux, cooling) or **simultaneous attachment of multiple accessories** (e.g., condenser thermometer addition funnel).

- You work in an **academic or industrial lab** where durability and compatibility with standard glassware are priorities.

- Your budget allows for a **high-quality, long-term investment** in laboratory glassware.

- You only require **basic heating or cooling** (a single-neck jacketed flask may suffice).

- Your budget is limited opt for a **non-jacketed 3-neck flask** (e.g., CG-1575-02) if temperature control is not critical.

- You frequently switch between glass and non-glass systems evaluate whether the added complexity of adapters outweighs the benefits.

- You work with **high-pressure or specialized reactions** (e.g., microwave synthesis), in which case a dedicated reactor system would be more appropriate.

For most **organic synthesis, teaching labs, or small-scale process development**, this flask is a **strong recommendation** due to its balance of functionality and reliability. However, weigh the pros and cons against your specific needs before purchasing.

Details:

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

part #: cg157602 prices

• $149.99-$400.00

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