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  3. VWR 58947-146

VWR 58947-146 Disposable Stirring Spinbar 2X5/16IN

58947-146 Vwr Qty 100 Disposable Stirring Spinbar 2x5/16in

( Brand: Vwr ), ( Manufacturer Part Number: 58947-146 ), ( Unit Type: Unit ), ( Color: White ), ( Country Of Origin: China )

Review VWR Qty 100 Disposable Stirring Spinbar 2x5/16in

The **VWR 58947-146 Disposable Stirring Spinbar (2 x 5/16-inch)** is a high-performance, single-use magnetic stirring bar designed to deliver precise and efficient agitation in laboratory settings where cleanliness, sterility, and ease of use are paramount. Engineered with a durable, high-density ceramic core, this spinbar ensures consistent and reliable stirring performance across a wide range of applications, from routine mixing and homogenization to delicate biochemical processes. Measuring **5/16 inches in diameter**, these spinbars are compact yet robust, making them ideal for small to medium-sized laboratory vessels, including flasks, beakers, and reaction vessels with compatible stirring plates. Their disposable nature eliminates the risk of cross-contamination between experiments, ensuring that each use begins with a fresh, uncontaminated surface critical for sensitive assays, cell culture work, or sterile media preparation. The spinbars are also designed to operate smoothly on standard magnetic stirrers, providing smooth, vibration-free rotation to prevent sample disturbance or aerosol formation. Constructed from inert, non-reactive materials, they are resistant to common solvents, acids, and bases, making them suitable for a broad spectrum of chemical and biological applications. Whether used in research laboratories, clinical diagnostics, or industrial testing facilities, these spinbars offer a convenient, cost-effective solution for laboratories seeking to maintain high standards of hygiene and operational efficiency without the hassle of cleaning or sterilizing reusable alternatives. Their compact size and disposable design also contribute to reduced waste handling and streamlined workflows, aligning with modern laboratory practices that prioritize both performance and sustainability.

### **Pros and Cons of buying a VWR 58947-146 Disposable Stirring Spinbar (2x 5/16-inch)**

#### **Pros:**

1. **Disposable Design** Eliminates the need for cleaning and sterilization, reducing contamination risks in laboratory settings. This is particularly useful for single-use experiments or when working with hazardous substances.

2. **Cost-Effective for Short-Term Use** Since it is disposable, there is no long-term investment in maintenance or replacement parts, making it economical for occasional or low-volume stirring applications.

3. **Compatibility with Common Lab Equipment** The 5/16-inch shaft size is standard for many magnetic stirrers, ensuring broad compatibility with existing lab setups.

4. **Reduced Cross-Contamination** Ideal for experiments where sterility is critical, such as microbiology or pharmaceutical testing, as it avoids the risk of carryover from reused stirrers.

5. **Convenience** No assembly or disassembly required; simply place it in the solution and activate the stirrer. This saves time in busy lab environments.

6. **Safety** Eliminates the risk of breakage or damage to reusable stirrers, which could lead to spills or equipment failure.

7. **Easy Disposal** Can be discarded after use without requiring special cleaning procedures, simplifying waste management in some cases.

#### **Cons:**

1. **Higher Per-Unit Cost** While it may seem cost-effective for short-term use, disposable stirrers can be more expensive per use compared to high-quality reusable alternatives over time.

2. **Environmental Impact** Contributes to laboratory waste, which may require proper disposal methods (e.g., hazardous waste if used with certain chemicals). This can increase disposal costs and environmental concerns.

3. **Limited Durability** Not suitable for prolonged or high-intensity stirring, as the material may degrade or dissolve in certain solvents or extreme conditions.

4. **Potential Material Limitations** Some disposable stirrers may not be compatible with aggressive chemicals, high temperatures, or organic solvents, leading to premature failure or contamination.

5. **No Customization** Unlike reusable stirrers, disposable ones cannot be modified or upgraded for specific applications (e.g., adding weights or changing materials).

6. **Storage and Logistics** Requires ongoing inventory management to ensure a steady supply, which may not be practical for labs with fluctuating demand.

7. **Potential Quality Variability** Depending on the manufacturer, there may be inconsistencies in performance or durability between batches, which could affect experimental reproducibility.

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### **Conclusion:**

The **VWR 58947-146 disposable stirring spinbar** is a practical choice for laboratories prioritizing **convenience, sterility, and short-term cost savings**, particularly in settings where contamination risks are high or where reusable stirrers are impractical. However, for **high-volume, long-term, or cost-sensitive applications**, reusable stirrers may offer better value despite the additional maintenance requirements.

### **Recommendation:** - **Use this product if:**

- You conduct **one-time or low-frequency experiments** where sterility and ease of use are critical.

- Your lab handles **hazardous or sensitive materials** where cross-contamination is a concern.

- You prefer **minimal maintenance** and do not want to invest in cleaning or sterilization processes.

- Your budget allows for **higher per-unit costs** in exchange for convenience.

- **Consider reusable alternatives if:**

- You perform **frequent or high-volume stirring** where cost efficiency over time is a priority.

- Your experiments involve **aggressive chemicals, high temperatures, or prolonged stirring**, which may degrade disposable stirrers.

- Your lab has **sustainability goals** and aims to reduce single-use waste.

- You require **customizable or high-durability stirrers** for specialized applications.

For most **routine laboratory work**, a balance between disposable and reusable options may be ideal using disposable stirrers for sensitive or one-time tasks and reusable ones for standard operations. Always verify compatibility with your specific stirrer motor and solvents before purchasing.

Details:

1 PACK OF 1 QTY 100 VWR 58947-146: DISPOSABLE STIRRING SPINBAR 2X5/16IN.

part #: 58947146 prices

  • $183.46-$189.99

specifications plasticwarelabsuppy:

  • brand: Vwr
  • mpn: 58947-146
  • unit type: Unit
  • color: White
  • country of origin: China

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  • Medical, Lab Dental Supplies > Glassware Plasticware > Other Medical Lab Glassware

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  • started: February 23, 2026
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unit type: unit, country of origin: china,
category: business & industrial > medical, lab dental supplies > glassware plasticware > medical lab glassware, color: white, sku: 13329488469573752,
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