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BUCHI Z403121 Coated Glass Round Bottom Receiving Flask 500ML 35/15

Z403121 Buchi Plastic-coated Glass 500ml 35/15 Round Bottom Receiving Flask

( Brand: Buchi ), ( Manufacturer Part Number: Z403121 ), ( 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 BUCHI Plastic coated Glass 500ml 35/15 Round Bottom Receiving Flask

The Buchi Z403121 Plastic-Coated Glass 500 mL 35/15 Round Bottom Receiving Flask is a precision-engineered laboratory vessel designed to meet the rigorous demands of modern chemical synthesis, distillation, and extraction processes. Crafted from high-quality borosilicate glass (Type 3.3) with a durable plastic coating, this flask combines the exceptional thermal resistance and chemical inertness of traditional glassware with the added protection of a protective polymer layer, minimizing the risk of thermal shock and contamination during high-temperature applications. The 500 mL capacity strikes an ideal balance between versatility and efficiency, accommodating a wide range of experiments while maintaining optimal reaction volumes without excessive material usage. Its 35/15 standard taper joint ensures seamless compatibility with a vast array of Buchi and third-party laboratory accessories, including condensers, adapters, and distillation heads, facilitating smooth integration into existing setups. The round bottom design enhances heat distribution and agitation efficiency, making it particularly well-suited for reflux reactions, rotary evaporation, and solvent recovery procedures. The plastic coating not only safeguards the glass from mechanical damage but also reduces the likelihood of scratches or abrasions that could compromise sterility or accuracy in sensitive applications. Whether used in academic research, pharmaceutical development, or industrial-scale synthesis, this flask exemplifies reliability and performance, offering chemists and technicians a robust tool for precise and reproducible laboratory operations. Its durable construction and thoughtful engineering make it a cornerstone of any well-equipped analytical or preparative chemistry laboratory.

### **Pros and Cons of buying a B chi Z403121 Plastic-Coated Glass 500 mL 35/15 Round Bottom Receiving Flask**

#### **Pros:**

1. **Durability and Chemical Resistance** The plastic coating provides enhanced protection against corrosive chemicals, reducing the risk of contamination or degradation compared to uncoated glass. This extends the flask s lifespan in harsh laboratory conditions.

2. **Safety and Reduced Breakage Risk** The plastic layer acts as a secondary barrier, minimizing the chance of glass shattering during thermal shock or mechanical stress, which is particularly useful in high-temperature or vacuum applications.

3. **Compatibility with Vacuum Systems** The 35/15 ground glass joint ensures a secure seal, making it suitable for use with rotary evaporators, distillation setups, or other vacuum-assisted processes.

4. **Versatility in Laboratory Applications** The round bottom design is ideal for even heating and efficient solvent recovery, making it useful for evaporation, distillation, and extraction processes.

5. **Easy to Clean and Maintain** The smooth surface of the plastic coating reduces residue buildup, simplifying cleaning procedures compared to uncoated glass, which may require more aggressive solvents.

6. **Cost-Effective for High-Use Labs** While slightly more expensive than standard glassware, the extended durability and reduced risk of failure can justify the investment in labs with frequent use.

7. **Compatibility with Autoclaving (if specified)** Some plastic-coated glassware is designed to withstand autoclaving, though this depends on the specific coating material. Always verify manufacturer guidelines.

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#### **Cons:**

1. **Higher Initial Cost** Plastic-coated glassware is generally more expensive than standard glass flasks, which may be a barrier for budget-conscious labs or individual researchers.

2. **Potential Coating Delamination** Over time or with improper handling, the plastic coating may peel or degrade, compromising its protective properties. This risk increases with frequent exposure to extreme temperatures or harsh chemicals.

3. **Limited Temperature Range** While the coating improves resistance, there may still be restrictions on maximum operating temperatures. Exceeding these limits could damage the coating or the glass.

4. **Weight and Handling** The added plastic layer makes the flask slightly heavier than standard glass, which may affect ease of handling during manual operations.

5. **Compatibility Concerns with Certain Solvents** Some solvents or reagents may interact negatively with the plastic coating, potentially causing swelling, leaching, or degradation. Always check solvent compatibility with the manufacturer.

6. **Maintenance of Seal Integrity** The 35/15 joint requires careful handling to prevent damage to the ground glass surface, which could compromise vacuum seals over time.

7. **Availability and Replacement Challenges** If the coating fails, finding an exact replacement may be difficult, and repairs (e.g., recoating) are not always feasible.

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### **Conclusion:**

The **B chi Z403121 plastic-coated glass receiving flask** is a valuable investment for laboratories that prioritize **durability, chemical resistance, and safety** in high-use or corrosive environments. Its protective coating mitigates risks associated with glassware failure, making it ideal for applications involving **distillation, evaporation, or solvent recovery** where reliability is critical. However, the **higher upfront cost, potential long-term coating degradation, and specific solvent limitations** must be carefully considered.

For **small-scale or low-budget labs** where chemical resistance is not a primary concern, standard glassware may suffice. Conversely, **industrial labs, pharmaceutical research, or settings handling aggressive chemicals** would benefit significantly from the added protection of this flask.

### **Recommendation:**

- **Buy if:** You work in a high-risk chemical environment, require frequent use of vacuum systems, or need long-term reliability in glassware. The coating s benefits in terms of safety and longevity outweigh the cost for these applications.

- **Avoid if:** Your budget is tight, the flask will see minimal use, or you are working with solvents known to degrade plastic coatings. In such cases, standard glassware or alternative materials (e.g., PTFE-coated options) may be more appropriate.

- **Consider alternatives:** If cost is a concern, evaluate whether a **lower-cost coated flask from another manufacturer** (e.g., Corning or Kimble) offers comparable protection. Additionally, assess whether **PTFE-lined or fully plastic flasks** (e.g., from Nalgene or other brands) better suit your needs.

Ultimately, the decision depends on balancing **cost, application demands, and long-term reliability**. Always consult manufacturer specifications and lab safety protocols before purchasing.

Details:

See pictures for details. Some minor signs of use with light residue. No chips or cracks throughout. GSR veers 1730 GS 9.9.4 1730 Used item in good condition.

part #: z403121 price

  • $48.99

specifications plasticwarelabsuppy:

  • brand: Buchi
  • mpn: Z403121
  • 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

general plasticwarelabsuppy:

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

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offer plasticwarelabsuppy:

  • options: Ship-to-home
  • started: February 5, 2026
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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,
category: business & industrial > medical, lab dental supplies > glassware plasticware > medical lab glassware, sku: 13214236686224633,
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  • Used. Offer #1 priced at $48.99 + $0.00 shipping estimate = $48.99* total. gsrx vers 1730 (GS 9.9.4 (1730)) Used item in good condition.FREE SHIPPING

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