CHEMGLASS CG-4512-03 Vacuum Trap Od Tubes 35MM 250MM 16MM

( Brand: Chemglass ), ( Manufacturer Part Number: CG-4512-03 ), ( Part Type: Vacuum Trap Tube )

Review CHEMGLASS Vacuum Trap 35mm Od 250mm 16mm Side Tubes

The Chemglass CG-4512-03 Vacuum Trap is a precision-engineered glassware component designed for high-performance laboratory applications requiring reliable gas and vapor removal in vacuum systems. Constructed from borosilicate glass (Type 3.3), this trap features a robust 35mm outer diameter (OD) and a compact 250mm length, making it ideal for integration into medium-scale vacuum setups without excessive space consumption. Its 16mm tube diameter provides a balanced flow path, ensuring efficient condensation or trapping of volatile substances while minimizing pressure drop and maximizing throughput. The trap s internal design incorporates a serpentine or coiled pathway, which enhances surface area for optimal condensation or adsorption of gases and vapors, depending on the application whether cooling with a surrounding bath or passive trapping via cold finger immersion. The seamless, ground-glass joints (standard 35mm OD/24mm ID) ensure leak-tight connections, while the durable construction resists thermal shock and chemical corrosion, making it suitable for a wide range of solvents, acids, and bases. Whether used in distillation, solvent recovery, or analytical instrumentation, this vacuum trap delivers consistent performance with minimal maintenance, embodying reliability and precision for demanding laboratory environments.

**Pros and Cons of buying a Chemglass CG-4512-03 Vacuum Trap (35mm OD, 250mm Length, 16mm Tube)**

### **Pros**

1. **High-Quality Construction** Chemglass is a well-established manufacturer known for producing durable glassware designed for laboratory use. This vacuum trap is likely built to withstand repeated use under vacuum conditions without leaking or breaking prematurely.

2. **Precision Dimensions** The specified dimensions (35mm outer diameter, 250mm length, 16mm tube) ensure compatibility with standard laboratory setups, making it easier to integrate into existing glassware assemblies.

3. **Efficient Trapping Functionality** The design of this trap is optimized to trap liquids or solids, preventing them from entering downstream components in a vacuum system. This is particularly useful in distillation, sublimation, or other vacuum-based processes.

4. **Chemical Resistance** Glass is inert to most chemicals, making this trap suitable for a wide range of applications, including those involving corrosive or reactive substances.

5. **Compatibility with Standard Fittings** The 16mm tube size aligns with common laboratory glass joints (e.g., 16/9 or 16/20 standard taper), reducing the need for adapters and ensuring a secure seal.

6. **Durability Under Vacuum** The trap is designed to handle vacuum pressures without collapsing or deforming, which is critical for applications requiring low-pressure environments.

7. **Easy to Clean and Maintain** Glassware is straightforward to clean, and the trap can be disassembled (if applicable) for thorough rinsing or replacement of internal components.

8. **Long-Term Reliability** Chemglass products are known for their longevity, reducing the need for frequent replacements and minimizing downtime in laboratory operations.

---

### **Cons**

1. **Fragility** Glass is brittle and can shatter if dropped or subjected to thermal shock (e.g., rapid heating or cooling). This requires careful handling and proper storage.

2. **Limited Reusability in Extreme Conditions** While durable, prolonged exposure to highly corrosive chemicals or extreme temperatures may eventually compromise the trap s integrity, necessitating replacement.

3. **Cost** High-quality glassware from reputable brands like Chemglass can be more expensive than cheaper alternatives, which may not always justify the investment for occasional or low-budget use.

4. **Maintenance Requirements** Glass traps may require periodic inspection for cracks, leaks, or residue buildup, adding to the overall maintenance workload.

5. **Specialized Knowledge for Assembly** Proper assembly of glass joints often requires experience to ensure a leak-tight seal. Improper assembly can lead to vacuum leaks or breakage.

6. **Weight and Bulk** Glassware is heavier and more cumbersome to transport or store compared to plastic or metal alternatives, which may be a consideration in space-constrained labs.

7. **Potential for Contamination** If not cleaned thoroughly, residual chemicals or particles from previous experiments can contaminate subsequent processes.

8. **Limited Availability of Replacement Parts** Unlike plastic or metal systems, repairing a broken glass trap often requires sourcing an identical replacement rather than individual components.

---

### **Conclusion**

The **Chemglass CG-4512-03 vacuum trap** is a robust, reliable, and chemically inert component ideal for laboratories requiring precise vacuum trapping in applications such as distillation, sublimation, or solvent recovery. Its high-quality construction, compatibility with standard glassware, and durability make it a strong choice for long-term use in demanding environments. However, its fragility, higher cost, and maintenance needs may pose challenges for users with limited experience or budget constraints.

For **most professional or academic laboratories**, the investment in this trap is justified by its performance, longevity, and compatibility with existing glassware systems. If cost or fragility is a concern, alternatives like high-quality plastic or metal traps (e.g., from brands like Ace Glass or custom-made options) could be considered, though they may lack the chemical resistance or precision of glass.

### **Recommendation**

- You require a durable, chemically inert, and high-precision component for routine vacuum operations.

- Your lab already uses Chemglass or standard 16mm glassware, ensuring compatibility.

- You prioritize long-term reliability and are willing to handle the trap with care.

- Budget constraints are not a critical factor, and the cost is justified by the trap s performance.

- You frequently handle fragile glassware and are concerned about breakage risks.

- Your applications involve extreme conditions (e.g., very high temperatures or corrosive chemicals) where alternative materials (e.g., fused silica or metal) might be more suitable.

- Cost is a limiting factor, and you can find equally effective but lower-cost options from other reputable manufacturers.

Details:

Shipping Details: originates from zip code 95742. Photos are of the actual unit for sale. Item was recently removed from working service and is in excellent order. If a custom power cord or AC adapter is required for the item, it only included if pictured described above.

Privacy: Rest assured your information will not be given, sold, rented or loaned to any third party. Includes Chemglass CG-4512-03 Vacuum Trap 35mm OD x 250mm L 16mm Side Tubes as pictured. Cosmetically in good condition showing minor scuffs / scratches blemishes from previous use. Item will come with a 30 Day Warranty.

part #: cg451203 price

• $99.99

specifications plasticwarelabsuppy:

• brand: Chemglass
• mpn: Cg-4512-03
• part type: Vacuum Trap Tube

payments plasticwarelabsuppy:

• credit card: Mastercard
• other
• wallet: Google-pay

seller plasticwarelabsuppy:

• city: Rancho Cordova, California
• # reviews: 44479
• rating: 99.9%

offer plasticwarelabsuppy:

• quantity: 1
• options: Ship-to-home
• started: June 6, 2026
• availability: In Stock
• sold: 0

shipping plasticwarelabsuppy:

• type: Fixed
• service: Standard, Expedited, Overnight
• cost: $0.00
• transit: 4-7 Days
• class: Standard, Expedited, One-day

returns plasticwarelabsuppy:

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

general plasticwarelabsuppy:

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

Chemglass CG-4512-03 Is Similar To:

• 5-neck Chemglass Reaction Vessel Neck Lid Center Side Schott Flange (36.1% similar) Chemglass reaction vessel 5 neck lid 45 50, 4 sides with 200MM Scott flange no chips, cracks or breaks. They are based on package size, weight and buyers zip code. I have quite a lot of lab chemistry glass available, if you don't see here, just ask and will check my inventory. Glass is clear with no...(November 8th, 2018)
• Cg-1049-j-30 Chemglass Series Vacuum Adapter Outer To Gpi Thread Ptfe Stopcock (36.1% similar) Please for more details the unique design of long stem filter funnel and vacuum adapter makes it unnecessary to clean after each use. Hose connection is 10MM od at the largest serration. The 2MM PDF stopcock between outer joint and standard taper inner permits control of vacuum source...(January 17th, 2019)
• Cg-1319-01 Chemglass Bump Trap Socket Cone (40.7% similar) This is Chemglass part cg here a bump trap for your rotary evaporator. The piece of equipment is clean and undamaged. The top is a standard taper socket, bottom cone...(November 21st, 2018)
• Cg-1320-03 Chemglass Bump Trap Rotary Evaporator Rotovap (32.8% similar) It comes with a 14 day guarantee against being DOA from receipt. Good luck buying. Warranty this item is guaranteed to be as described. Shipping buyer pays for all shipping costs. Orders are shipped to the cardholders billing address. Power cords and adapters are never included unless specifically ...(March 29th, 2019)
• Cg-1320-09 Kontes Chemglass Glass Rotary Evaporator Rotovap Bump Trap Joints (29.6% similar) Chemglass glass 500ML rotary evaporator rooftop bump trap joints condition is used. Shipped with USPS priority mail...(June 9th, 2019)
• Cg-1321-01 Chemglass Rotary Evaporator Modified Bump Trap With Top Outer (34.8% similar) Traps have a top outer joint and the listed size of lower inner. Chemglass cg rotary evaporator modified bump trap with top outer and lower inner, 100ML capacity inner similar to CG-1320, but the addition of two 4MM drain holes at base tube allow solvent back into evaporation flask...(March 20th, 2019)
• Cg 1321-14 Chemglass Rotary Evaporator Bump Trap Modified Top Bottom (32.8% similar) Has 2 small drainage holes at base of inner tube. Rotary evaporator bump trap modified. 24 40 top and bottom joint 500ML...(December 28th, 2018)
• Cg-1840-02 Chemglass Melting Point Tubes Id Cg (30.4% similar) I try to list accurately. Chemglass melting point tubes. Most items I list are from estate sales and what know about them is whats on there tags...(March 28th, 2019)
• Cg 4434 Chemglass Gas Vacuum Manifold Ports Single Bank (43% similar) Chemglass gas vacuum manifold 5 ports single stopcocks not included like cg 4434...(December 28th, 2018)
• Cg-4512-02 Chemglass Vacuum Trap Body Od Inner Tube (54.7% similar) ...(February 7th, 2019)
• Cg-4515-06 Chemglass Vacuum Trap Stopper Only Inner Jt (45% similar) Chemglass vacuum trap stopper only inner jet cg new - no retail box: two piece construction for easy removal of condensate. Inlet and outlet are apart for installation into a variety of vacuum systems. Stopper has a standard taper inner joint and body an outer. Of 13MM at the smallest serration and ...(November 12th, 2018)