CHEMGLASS CG-414-02 Glass Stopcock Double Oblique Arms 180 3-WAY 4MM 10MM

( Brand: Chemglass ), ( Manufacturer Part Number: CG-414-02 ), ( Model: CHEMGLASS CG-414-02 ), ( Part Type: Stopcock Arm ), ( Unit Type: Unit ), ( Country Of Origin: United States )

Review CHEMGLASS 180 3-way Glass Stopcock 4mm Double Oblique Bore 10mm Arms

The **Chemglass CG-414-02 180 Three-Way Glass Stopcock with 4mm Double Oblique Port and 10mm Arms** is a precision-engineered glass stopcock designed for high-performance laboratory applications requiring reliable fluid control and compatibility with standard glassware. Crafted from borosilicate glass (Type 1, per USP/EP standards), this stopcock features a durable, chemically resistant construction that ensures longevity even under rigorous use in analytical chemistry, pharmaceutical synthesis, or industrial process control. The **180 three-way design** allows for versatile routing of gases or liquids, enabling seamless switching between inlet, outlet, and vent ports without the need for external valves, which minimizes dead volume and maximizes efficiency in flow-based experiments. The **double oblique 4mm port** is optimized for precise fluid metering and reduced turbulence, making it ideal for applications such as gas chromatography, solvent delivery systems, or vacuum line manipulations where consistent flow rates are critical. The **10mm arms** provide ample connection points for standard glass joints (e.g., 10/30 or 14/23 ground glass joints), ensuring compatibility with a wide range of laboratory glassware, including condensers, adapters, and reaction vessels. The stopcock s **ceramic or Teflon -coated plug** (depending on the model variant) offers low-friction operation, reducing the risk of sticking or leakage while maintaining a tight seal under varying pressure conditions. Its **smooth, polished glass surfaces** further enhance clarity and ease of cleaning, which is essential for maintaining sterility in sensitive procedures. Whether integrated into a custom gas manifold, a solvent delivery system, or a vacuum filtration setup, this stopcock delivers uncompromising performance, combining durability with the precision required for demanding laboratory workflows.

**Pros and Cons of buying a Chemglass CG-414-02 180 3-Way Glass Stopcock (4mm Double Oblique, 10mm Arms)**

1. **Material Quality and Durability** Chemglass products are known for their high-quality borosilicate glass, which is chemically resistant, durable, and less prone to cracking or corrosion compared to plastic alternatives. This makes it suitable for laboratory use where reliability is critical.

2. **Precision Engineering** The 180 design and double oblique configuration allow for precise control of fluid flow, reducing dead volume and minimizing contamination. This is particularly useful in applications requiring accurate dosing or switching between multiple lines.

3. **Compatibility with Standard Laboratory Equipment** The 4mm bore size and 10mm arms are common dimensions in laboratory glassware, making it easy to integrate with other glass joints, adapters, and connectors. This ensures seamless compatibility with existing setups.

4. **Chemical Resistance** Borosilicate glass (e.g., Type 1 or Type 3) resists most acids, bases, and organic solvents, making it ideal for a wide range of chemical applications, including synthesis, chromatography, and sample preparation.

5. **Reusable and Low Maintenance** Unlike disposable plastic components, this stopcock can be cleaned and reused multiple times, reducing long-term costs. It can be easily disassembled for cleaning or replacement of the rubber gasket (if applicable).

- Fractional distillation setups

- Vacuum systems

- Gas washing or scrubbing apparatuses

- Sample introduction systems (e.g., GC or HPLC)

7. **Brand Reputation** Chemglass is a well-established manufacturer in the laboratory glassware industry, known for producing reliable, high-performance components. Their products are widely trusted by researchers and educators.

8. **Standardized Design** The double oblique configuration reduces the risk of clogging or trapping particles compared to straight or angled designs, which can be advantageous in applications involving suspensions or heterogeneous mixtures.

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1. **Fragility Compared to Plastic** While borosilicate glass is durable, it is still more brittle than plastic or metal alternatives. It can shatter if dropped or subjected to thermal shock (e.g., rapid temperature changes). This requires careful handling, especially in busy lab environments.

2. **Potential for Leaks** Over time, the rubber gasket (if present) may degrade or become damaged, leading to leaks. This requires periodic inspection and replacement of the gasket, which adds to maintenance efforts.

3. **Limited Temperature Range** While borosilicate glass can handle moderate temperatures, extreme heat (e.g., above 300 C) or rapid cooling can cause stress fractures. For high-temperature applications, specialized glass or metal alternatives may be necessary.

4. **Cost** Compared to plastic stopcocks or cheaper glass alternatives, Chemglass products are more expensive upfront. However, their longevity often justifies the cost in professional settings.

5. **Cleaning and Sterilization Challenges** Glass components require thorough cleaning to remove residues, which can be time-consuming. Some stubborn organic or inorganic deposits may require harsh chemicals or ultrasonic cleaning, adding to the workload.

6. **Size and Weight** The glass stopcock is heavier than plastic counterparts, which can be cumbersome during frequent adjustments or in automated systems where weight is a factor.

7. **Potential for Glass Delamination** In rare cases, poor-quality glass or improper manufacturing can lead to internal defects, such as delamination, which may not be visible until failure occurs. Reputable brands like Chemglass minimize this risk, but it remains a theoretical concern.

8. **Limited Customization** Unlike metal stopcocks, glass stopcocks are not easily modified for specialized applications. Custom machining or threading may be required for non-standard setups, which can be costly.

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The **Chemglass CG-414-02 3-way glass stopcock** is an excellent choice for laboratories requiring **precision, chemical resistance, and durability** in their glassware. Its borosilicate construction ensures reliability in most chemical applications, while its standard dimensions and versatile design make it highly adaptable. The trade-offs such as fragility, maintenance needs, and higher cost are outweighed by its performance in professional settings where quality and longevity are prioritized.

- Academic and industrial research labs

- Applications involving corrosive or volatile chemicals

- Setups requiring minimal dead volume (e.g., chromatography, distillation)

- Environments where reusable, high-quality components are preferred over disposable alternatives

For users in **high-throughput or automated systems** where durability and ease of handling are critical, or for applications involving **extreme temperatures or pressures**, alternative materials (e.g., metal or reinforced plastic) may be more appropriate. However, for most standard laboratory uses, the CG-414-02 is a robust and practical investment.

- You need a reliable, chemically resistant stopcock for general laboratory use.

- Your workflow involves precise fluid control and compatibility with standard glassware.

- You are willing to invest in a durable, long-term solution that reduces replacement costs.

- Your application involves **extreme temperatures, high pressures, or frequent mechanical stress**, where metal or reinforced plastic stopcocks may be more suitable.

- Budget constraints are a priority, and you can tolerate slightly lower durability (though this would compromise performance).

- Your lab handles **very fragile samples** where even minor leaks or breakage could be catastrophic (in which case, metal or Teflon-lined stopcocks may be safer).

For most researchers and technicians, the **Chemglass CG-414-02 is a strong recommendation** due to its balance of quality, precision, and versatility. Always ensure proper handling and storage to maximize its lifespan.

Details:

Chemglass CG-414-02 180 3-Way Glass Stopcock 4mm Double Oblique Bore 10mm Arms New, see photos -BJ.

part #: cg41402 price

• $119.00

specifications plasticwarelabsuppy:

• brand: Chemglass
• mpn: Cg-414-02
• model: Chemglass Cg-414-02
• part type: Stopcock Arm
• unit type: Unit
• country of origin: United States

offer plasticwarelabsuppy:

• best offers: True
• availability: In Stock
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• quantity: 1
• started: June 8, 2026

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• condition: New Open box
• Medical, Lab Dental Supplies > Glassware Plasticware > Other Medical Lab Glassware

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