1. Plasticware Lab Supplies For Sale
  2. sku: 14008423199283731
  3. KONTES 634530-0060

KONTES 634530-0060 Graduated Addition Funnel Stopcock 24/40

634530-0060 Kontes Graduated Addition Funnel With Stopcock 60 Ml 24/40

( Brand: Kontes ), ( Manufacturer Part Number: 634530-0060 ), ( Part Type: Stopcock )

Review KONTES Graduated Addition Funnel Stopcock 60 Ml 24/40

The Kontes 634530-0060 graduated addition funnel with stopcock is a precision-engineered laboratory accessory designed to elevate the efficiency and accuracy of liquid additions in chemical synthesis, titration procedures, and other demanding laboratory applications. Constructed from high-quality borosilicate glass (Type 1, Class A), this funnel combines durability with exceptional chemical resistance, ensuring compatibility with a wide range of solvents, acids, and bases, including those commonly used in organic synthesis, analytical chemistry, and pharmaceutical development. The graduated markings, etched with precision, allow for meticulous volume measurements down to the milliliter, facilitating reproducible and consistent additions critical for experimental success. The integrated stopcock, featuring a smooth, PTFE-tipped valve, enables seamless control over liquid flow, reducing splashing and minimizing contamination risks while maintaining a tight seal when closed. The standard taper joint (24/40) ensures a secure, leak-proof connection to glassware such as round-bottom flasks, Erlenmeyer flasks, or other compatible laboratory apparatus, making it versatile for use in both open and closed reaction systems. The 60 mL capacity strikes a practical balance, accommodating moderate volumes without excessive bulk while still accommodating many routine laboratory procedures. Whether used for slow, controlled additions to maintain reaction stoichiometry or for precise titrations requiring incremental dosing, this funnel exemplifies reliability and functionality, making it an indispensable tool for researchers, chemists, and students alike. Its robust construction and thoughtful design ensure longevity, even under rigorous laboratory conditions, while its compatibility with standard laboratory glassware integrates seamlessly into existing workflows.

### **Pros and Cons of buying a Kontes 634530-0060 Graduated Addition Funnel with Stopcock (60 mL, 24/40 Joint)**

#### **Pros:**

1. **Versatility in Laboratory Use** The graduated addition funnel is designed for precise liquid additions, making it ideal for titrations, solvent additions, and other controlled dispensing tasks in chemistry labs. The stopcock allows for fine control over flow rate, reducing spillage and improving accuracy.

2. **Graduated Scale for Measurement** The 60 mL graduated markings enable accurate volume measurements, which is crucial for experiments requiring precise liquid quantities. This eliminates the need for separate volumetric glassware for small additions.

3. **Compatibility with Standard Glassware** The 24/40 joint ensures compatibility with most standard laboratory glassware, including flasks, condensers, and other glass apparatus. This makes it easy to integrate into existing setups without additional adapters.

4. **Durability and Chemical Resistance** Kontes glassware is known for its high-quality borosilicate glass, which is resistant to most chemicals and can withstand moderate thermal shock. This makes it suitable for a wide range of laboratory applications.

5. **Stopcock for Controlled Flow** The built-in stopcock allows for gradual addition of liquids, reducing the risk of overflow or sudden spills. This is particularly useful in reactions where rapid addition could disrupt equilibrium or cause safety hazards.

6. **Easy Cleaning and Maintenance** Glass components are generally easier to clean than plastic or metal alternatives, and borosilicate glass is less prone to scratching or degradation over time.

7. **Long-Term Reliability** Kontes is a reputable brand with a history of producing durable laboratory glassware, reducing the likelihood of frequent replacements or malfunctions.

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#### **Cons:**

1. **Fragility** Glassware is inherently breakable, which poses a risk of injury and contamination if dropped or mishandled. This requires careful handling and storage.

2. **Limited Volume Capacity** At 60 mL, this funnel may not be suitable for large-scale reactions or procedures requiring larger volumes. Users may need additional glassware for bigger tasks.

3. **Potential for Leaks** Over time, the stopcock or joint seals (if not properly lubricated) may wear out or become less effective, leading to leaks. Regular maintenance is required to ensure a tight seal.

4. **Cost** High-quality glassware like this can be more expensive than plastic alternatives, which may be a consideration for budget-conscious labs or students.

5. **Requires Proper Lubrication** The stopcock may need periodic lubrication (e.g., with stopcock grease) to function smoothly. Failure to do so can lead to sticking or leaks.

6. **Not Ideal for High-Pressure Applications** While suitable for most lab uses, this funnel is not designed for high-pressure systems or vacuum applications beyond standard laboratory conditions.

7. **Single-Use Considerations** In some cases, glassware may be discarded after use to avoid cross-contamination, which can add to disposal costs over time.

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### **Conclusion:**

The Kontes 634530-0060 graduated addition funnel with stopcock is a highly functional and precise tool for laboratory applications requiring controlled liquid additions. Its graduated markings, stopcock control, and compatibility with standard glassware make it a valuable asset for chemists, students, and researchers. However, its fragility, cost, and maintenance requirements must be carefully considered. For labs with limited budgets or those handling highly corrosive substances, alternatives like plastic funnels or other glassware may need to be evaluated.

### **Recommendation:**

This funnel is **highly recommended** for laboratories that prioritize accuracy, durability, and versatility in glassware. It is particularly suitable for:

- Undergraduate and graduate chemistry labs.

- Titration and controlled addition procedures.

- Setups requiring precise liquid measurements without frequent transfers.

If budget is a concern, consider purchasing a backup or exploring slightly less expensive alternatives from other reputable brands. Always ensure proper handling, storage, and maintenance to maximize its lifespan and performance. For applications involving highly corrosive or abrasive chemicals, verify compatibility with the manufacturer s guidelines.

Details:

Photos are of the actual unit for sale. Includes Kontes Graduated Addition Funnel W/ Stopcock, 60 mL, 24/40 as pictured. Cosmetically in good condition showing minor scuffs / scratches blemishes from previous use. Privacy: Rest assured your information will not be given, sold, rented or loaned to any third party.

Item was recently removed from working service and is in excellent order. Item will come with a 30 Day Warranty. If a custom power cord or AC adapter is required for the item, it only included if pictured described above. Shipping Details: originates from zip code 95742.

part #: 6345300060 prices

  • $44.99-$48.45

specifications plasticwarelabsuppy:

  • brand: Kontes
  • mpn: 634530-0060
  • part type: Stopcock

seller plasticwarelabsuppy:

  • city: Rancho Cordova, California
  • rating: 99.9%
  • # reviews: 44472

returns plasticwarelabsuppy:

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

general plasticwarelabsuppy:

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

offer plasticwarelabsuppy:

  • availability: In Stock
  • options: Ship-to-home
  • started: June 5, 2026
  • quantity: 1
  • sold: 0

shipping plasticwarelabsuppy:

  • class: Standard, Expedited, One-day
  • service: Standard, Expedited, Overnight
  • transit: 5-11 Days
  • cost: $0.00
  • type: Fixed

payments plasticwarelabsuppy:

  • other
  • credit card: Discover
  • wallet: Apple-pay
part type: stopcock,
category: business & industrial > medical, lab dental supplies > glassware plasticware > medical lab glassware, sku: 14008423199283731,
Kontes 634530-0060 Is Similar To:
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2 offers $44.99–$48.45 USD
  • Used. Offer #1 priced at $44.99 + $0.00 shipping estimate = $44.99* total. . Item was recently removed from working service and is in excellent working order.FREE SHIPPING
  • Used. Offer #2 priced at $48.45 + $0.00 shipping estimate = $48.45* total. Stopcock Bore Size (mm) 2. Cylindrical funnels have a pressure equalizing line, a PTFE stopcock, and a lower drip tip.FREE SHIPPING

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