CHEMGLASS AF-0210-01 Schlenk Airfree Glass Stopper Ring 15MM

( Brand: Chemglass ), ( Manufacturer Part Number: AF-0210-01 ), ( Model: 15MM ), ( Part Type: Ring Stopper ), ( Intended Use/discipline: Biological Laboratory, Microbiological Laboratory )

Review CHEMGLASS Schlenk #15mm Airfree Glass Stopper O ring New

The **Chemglass AF-0210-01 Air-Free Schlenk 15mm Glass Stopper with O-Ring** is a precision-engineered component designed for high-vacuum and air-sensitive applications in laboratory settings, particularly within the realms of organic synthesis, materials science, and analytical chemistry. Crafted from borosilicate glass (Type 3.3, equivalent to Kimble K-Max or equivalent), this stopper is engineered to withstand extreme thermal and mechanical stresses, ensuring reliability in environments where even trace amounts of moisture or oxygen can compromise experimental integrity. The **15mm ground-glass joint** adheres to standard Schlenk line dimensions, allowing seamless integration with a wide array of glassware, including flasks, round-bottom reactors, and distillation apparatuses, while the **PTFE (polytetrafluoroethylene) O-ring** embedded within the stopper s bore provides an airtight seal that resists permeation from volatile solvents, reactive gases, or aggressive reagents. This design eliminates the need for traditional rubber stoppers or corks, which are prone to degradation, outgassing, or contamination, thereby enhancing both the purity of reactions and the longevity of the glassware. The stopper s **smooth, polished surface** minimizes dead-space and facilitates efficient stirring or gas flow when paired with compatible glassware, while its **durable construction** ensures resistance to thermal shock, making it suitable for applications involving cryogenic cooling or high-temperature reactions. Whether used in inert-atmosphere glove boxes, Schlenk lines, or vacuum manifolds, this stopper exemplifies the balance of functionality and precision required for modern synthetic chemistry, offering chemists a dependable solution for maintaining air-free conditions in their most demanding experiments.

### **Pros and Cons of buying a Chemglass AF-0210-01 (15mm Air-Free Glass Stopper with O-Ring)**

1. **Air-Free Design** The stopper is specifically engineered to maintain an inert atmosphere, reducing exposure to air and moisture, which is critical for air-sensitive reactions.

2. **High-Quality Glass Construction** Chemglass is a reputable manufacturer known for durable, chemically resistant borosilicate glass, which is ideal for laboratory use.

3. **Standardized Size (15mm)** The 15mm diameter fits common laboratory glassware, making it versatile for flasks, round-bottom bottles, and other standard equipment.

4. **O-Ring Seal** The integrated O-ring ensures a tight, leak-proof seal, preventing contamination and maintaining reaction integrity.

5. **Compatibility with Schlenk Techniques** Designed for use in Schlenk lines, where precise control of atmosphere is essential for synthesis of air-sensitive compounds.

6. **Reusable and Durable** Unlike disposable stoppers, this is built for repeated use, reducing waste and long-term costs.

7. **Easy to Clean and Sterilize** Can be washed, baked, or soaked in solvents for reuse, maintaining sterility between experiments.

1. **Limited Compatibility** Only fits 15mm necks; if your glassware has a different diameter, it won t work without adapters.

2. **Potential O-Ring Wear** Over time, the O-ring may degrade from exposure to solvents, heat, or repeated use, requiring replacement.

3. **Cost** Compared to basic rubber or glass stoppers, this specialized stopper is more expensive, though it justifies the price for air-sensitive applications.

4. **Breakage Risk** Like all glassware, it can shatter if dropped or subjected to thermal shock (e.g., rapid temperature changes).

5. **Maintenance Required** The O-ring must be periodically inspected and replaced to ensure a proper seal, adding slight extra upkeep.

6. **Not Universal** Some Schlenk setups may require additional fittings or adapters, depending on the specific setup.

The **Chemglass AF-0210-01** is an excellent investment for laboratories conducting air-sensitive chemistry, Schlenk reactions, or any process requiring an inert atmosphere. Its air-tight design, durability, and compatibility with standard glassware make it a reliable choice, despite the higher initial cost and minor maintenance needs. However, if budget is a constraint or if the application does not require strict air exclusion, a simpler stopper may suffice.

- You work with air-sensitive compounds (e.g., organometallics, radicals, or highly reactive intermediates).

- Your glassware has a 15mm neck and requires a leak-proof, reusable seal.

- You prioritize long-term reliability and precision in your reactions.

- Your setup does not require an air-free environment.

- You frequently use non-standard glassware sizes that don t fit 15mm stoppers.

- Budget constraints make this an impractical choice, and a basic rubber or glass stopper would suffice.

For most advanced synthetic chemists, the **AF-0210-01 is a worthwhile purchase** due to its performance and longevity.

Details:

I could not be happier with the piece of equipment that was able to get through New Life. Quality, Inspection: Our instruments are inspected, tested, repaired, serviced and supported by our technicians. I feel very lucky. Manufacturer.

30 DAY, WARRANTY: This instrument is backed with a 30-day warranty, protecting you against breakdowns and damage. Chemglass Schlenk #15 Glass Stopper - 30 Day Warranty, Specifications. They are very responsive, especially Micah. Because we placed an order through New Life Scientific for a used Loopholes, were able to get that super fast, so could move forward.

Supplied complete with one Vito O-Ring. I looked at a few local refurbishing companies. They really make me feel like an important customer. For use with the AF-0060 or AF-0061 manifolds any Airfree component, an o-ring as a closure.

I wouldn't say had bad experiences, BUT only good experiences with New Life Scientific.

part #: af021001 prices

• $24.99-$79.00

specifications plasticwarelabsuppy:

• brand: Chemglass
• mpn: Af-0210-01
• model: 15mm
• part type: Ring Stopper
• intended use/discipline: Biological Laboratory, Microbiological Laboratory

payments plasticwarelabsuppy:

• credit card: Diners-club
• wallet: Paypal
• other

offer plasticwarelabsuppy:

• sold: 0
• started: March 18, 2026
• availability: In Stock
• quantity: 1
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• options: Ship-to-home

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• class: Standard, Expedited, One-day
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• cost: $21.09
• carrier: UPS

seller plasticwarelabsuppy:

• city: Lima, Ohio
• rating: 99.5%
• # reviews: 8541

general plasticwarelabsuppy:

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

returns plasticwarelabsuppy:

• method: Money back
• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

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