CHEMGLASS CG-3018-02 Flask Stopper Glass Total

( Brand: Chemglass ), ( Manufacturer Part Number: CG-3018-02 ), ( Part Type: Stopper ), ( Country Of Origin: United States ), ( Intended Use/discipline: Biological Laboratory, Dental Laboratory, Medical Laboratory, Microbiological Laboratory, Physical Laboratory, Veterinary Medicine ), ( Unit Type: Unit )

Review CHEMGLASS Flask Stopper Glass Size Total Of Stoppers

The **Chemglass CG-3018-02 Glass Stopper Set** is a meticulously engineered, high-quality laboratory accessory designed to provide an airtight, chemically resistant seal for glassware, ensuring precision and reliability in a wide range of scientific applications. This set includes **13 precision-molded glass stoppers**, each crafted from borosilicate glass (Type I, per USP/EP standards), which offers exceptional thermal stability, resistance to corrosion, and durability under rigorous laboratory conditions. The stoppers are engineered with a **tapered, ground-glass joint** that delivers a secure, leak-proof fit when properly seated, minimizing contamination risks and preserving the integrity of volatile or sensitive samples. Their smooth, polished surfaces not only enhance ease of insertion and removal but also reduce friction, making them ideal for frequent use in experiments requiring repeated access. The set is particularly well-suited for use with standard laboratory glassware, including Erlenmeyer flasks, volumetric flasks, and reagent bottles, where a consistent seal is critical for maintaining reaction conditions, preventing moisture absorption, or protecting samples from atmospheric interference. Beyond their functional excellence, these stoppers are designed with practicality in mind, featuring a **uniform, unbreakable design** that resists warping or degradation over time, even when exposed to organic solvents, acids, or high-temperature applications. Whether used in analytical chemistry, pharmaceutical development, or educational settings, the **Chemglass CG-3018-02** ensures both efficiency and safety, making it an indispensable component for any well-equipped laboratory.

**Pros and Cons of buying a Chemglass CG-3018-02 Flask Stopper (Glass, 13-Piece Set)**

1. **Durability and Chemical Resistance** Made from borosilicate glass, these stoppers are highly resistant to thermal shock and most common laboratory chemicals, making them ideal for long-term use in acidic, basic, or organic solvents.

2. **Compatibility with Standard Glassware** Designed to fit standard 13/20 joint glassware, ensuring a secure seal and reducing the risk of leaks or contamination.

3. **Reusability** Unlike disposable stoppers, these can be cleaned and reused multiple times, reducing waste and long-term costs.

4. **Sterility and Contamination Control** Glass is non-porous, preventing microbial growth and chemical absorption, which is critical in sterile or sensitive experiments.

5. **Temperature Resistance** Can withstand heating, cooling, and autoclaving, making them suitable for applications requiring high or low temperatures.

6. **Precision Fit** The 13-piece set provides redundancy, ensuring you always have a spare stopper available for experiments.

7. **Compatibility with Vacuum Systems** The design allows for use in vacuum applications, such as distillation or filtration, where an airtight seal is necessary.

8. **Long-Term Investment** High-quality glassware lasts for years with proper care, making it a cost-effective choice over disposable alternatives.

1. **Fragility** Glass is prone to breakage if dropped or subjected to sudden impacts, which could damage the stopper or contaminate experiments.

2. **Weight** Compared to plastic or rubber stoppers, glass is heavier, which may be inconvenient for frequent handling or portable setups.

3. **Cleaning and Maintenance** Requires thorough cleaning (often with detergents or ultrasonic baths) to remove residues, which can be time-consuming.

4. **Cost** While durable, the upfront cost is higher than disposable alternatives like rubber or plastic stoppers.

5. **Limited Flexibility** Unlike silicone or rubber stoppers, glass does not conform to irregular shapes and may not fit all types of glassware perfectly.

6. **Potential for Scratches or Damage** Scratches or chips can compromise the seal or introduce contaminants if not properly cleaned.

7. **Not Ideal for High-Pressure Applications** While suitable for vacuum, glass stoppers may not be appropriate for high-pressure systems where plastic or metal alternatives are safer.

The **Chemglass CG-3018-02 borosilicate glass stopper set** is a superior choice for laboratories requiring **durability, chemical resistance, and sterility**. Its long-term reliability and compatibility with standard glassware make it ideal for routine use in chemistry, biology, and related fields. However, its **fragility, higher cost, and maintenance requirements** may make it less practical for casual or high-risk applications where breakage is a concern.

- **Buy if:** You need a **long-term, reusable, and chemically inert** stopper for standard laboratory glassware, particularly in applications involving **heating, cooling, or vacuum systems**. It is best suited for **academic, industrial, or research settings** where quality and durability are prioritized.

- **Avoid if:** You require **lightweight, disposable, or flexible** stoppers (e.g., for fieldwork, teaching labs with frequent breakage, or high-pressure systems). In such cases, consider **plastic or rubber alternatives** (e.g., PTFE-lined stoppers) for added safety.

- **Alternative Consideration:** If budget is a concern, a **smaller set (e.g., 5-7 stoppers)** may suffice for basic use, but the 13-piece set ensures redundancy for critical experiments.

For most **serious laboratory work**, the **Chemglass CG-3018-02 is a highly recommended investment** due to its performance and longevity.

Details:

Chemglass Flask Stopper Glass Penny head Size 13 Lot of 5 Stoppers CG-3018-02.

part #: cg301802 prices

• $8.99-$41.18

specifications plasticwarelabsuppy:

• brand: Chemglass
• mpn: Cg-3018-02
• part type: Stopper
• country of origin: United States
• intended use/discipline: Biological Laboratory, Dental Laboratory, Medical Laboratory, Microbiological Laboratory, Physical Laboratory, Veterinary Medicine
• unit type: Unit

seller plasticwarelabsuppy:

• city: Denton, Texas
• rating: 100.0%
• # reviews: 2564

payments plasticwarelabsuppy:

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

offer plasticwarelabsuppy:

• quantity: 1
• availability: In Stock
• started: June 11, 2026
• sold: 0
• options: Ship-to-home
• best offers: True

shipping plasticwarelabsuppy:

• carrier: USPS
• type: Fixed
• cost: $0.00
• class: Standard, Expedited
• service: USPS Ground Advantage, Expedited
• transit: 5-8 Days

general plasticwarelabsuppy:

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

returns plasticwarelabsuppy:

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

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