Erlenmeyer Flask 250ml EISCO Borosilicate Glass with PTFE Screw Cap

Description

Product Overview

The EISCO Erlenmeyer Flask offers a 250 ml capacity crafted from high‑quality borosilicate glass, renowned for its exceptional thermal resistance and chemical durability. Hand‑blown with precision, the flask features a smooth conical body and clear white graduations that enable accurate volume measurements, making it a reliable tool for a wide range of scientific applications.

Designed with a PTFE‑lined polypropylene screw cap, the flask provides a secure, leak‑proof seal that resists acids and solvents while tolerating repeated autoclave cycles. The cap’s PTFE liner adds an extra layer of chemical inertness, ensuring that even aggressive reagents remain contained without compromising the integrity of the flask.

Dimensions are thoughtfully balanced: a base diameter of 2.75 inches and an overall height of 5 inches give the flask a stable footprint while maintaining a compact profile suitable for crowded lab benches or storage racks. Despite hand‑blown variations, each unit meets strict tolerances for volume accuracy and wall thickness.

Beyond its laboratory credentials, the flask’s clear glass construction and elegant design make it an attractive addition to home chemistry kits, educational demonstrations, or even creative projects such as decorative “potions” displays. Its versatility bridges professional and hobbyist environments seamlessly.

Maintenance is straightforward; the flask is top‑rack dishwasher safe and fully autoclavable, allowing for rapid turnaround between experiments. This durability reduces long‑term costs and supports sustainable lab practices by minimizing the need for disposable containers.

Overall, the EISCO Erlenmeyer Flask combines functional performance, robust materials, and user‑friendly features, delivering a dependable solution for precise liquid handling in any setting.

Usage

In a research laboratory, the flask excels for titration, mixing, and heating tasks where temperature stability and chemical resistance are essential. Its conical shape promotes efficient swirling, while the PTFE‑lined cap prevents vapor loss during prolonged heating or reflux procedures.

Educators frequently employ the flask in classroom demonstrations, allowing students to observe clear liquid volumes and practice accurate measurement techniques. The robust glass withstands accidental impacts, making it a safe choice for hands‑on learning environments.</n

Home experimenters appreciate the flask’s dual capability for scientific work and decorative purposes. Whether brewing small‑batch infusions, creating visual art with colored solutions, or storing specialty liquids, the flask’s aesthetic appeal adds value beyond pure functionality.

Industrial settings benefit from the flask’s compatibility with standard laboratory equipment, such as magnetic stirrers, heating mantles, and clamp systems. Its autoclavable nature ensures compliance with stringent hygiene standards required in pharmaceutical or biotech production.

For field work, the secure screw cap protects samples from contamination and spillage, enabling reliable transport of reagents to remote locations. The flask’s lightweight design (approximately 4 ounces) eases handling during extended field campaigns.

Why Choose Us

EISCO’s commitment to quality is evident in every aspect of the flask’s construction. The use of premium borosilicate glass, sourced from reputable manufacturers, guarantees resistance to thermal shock and chemical attack, extending the product’s lifespan under demanding conditions.

Each flask undergoes rigorous inspection for dimensional accuracy, graduation clarity, and cap integrity. This quality control process ensures that every unit meets the expectations of professional scientists and discerning hobbyists alike.

Our PTFE‑lined caps are engineered for long‑term performance, offering a chemically inert barrier that remains effective after numerous autoclave cycles. This feature reduces the need for frequent cap replacement, delivering cost savings over the product’s lifecycle.

Customer support is a cornerstone of the EISCO experience. Our technical team is available to answer questions about proper usage, cleaning protocols, and compatibility with laboratory accessories, providing peace of mind throughout the product’s use.

Finally, EISCO prioritizes sustainability by offering a reusable, durable glassware solution that minimizes waste compared to disposable plastic containers. Choosing our flask aligns with environmentally responsible laboratory practices.

Key Features

• Premium borosilicate glass provides superior thermal resistance and chemical durability for reliable performance.
• PTFE‑lined polypropylene screw cap ensures a leak‑proof, acid‑resistant seal that withstands autoclave cycles.
• Clear white graduations enable precise volume measurement, reducing errors in experimental protocols.
• Compact conical design offers stable footing and efficient mixing, ideal for both lab and home use.
• Responsive customer support and comprehensive warranty give confidence in long‑term product reliability.

FAQ

Can this flask be used for high‑temperature applications?

Yes. The borosilicate glass composition is specifically formulated to tolerate rapid temperature changes and sustained heating up to 500 °F (260 °C). This makes the flask suitable for boiling, reflux, and other high‑temperature procedures without risk of cracking.

Is the PTFE liner compatible with strong acids and bases?

The PTFE liner is chemically inert to a wide range of acids, bases, and organic solvents. It resists corrosion from hydrochloric acid, sulfuric acid, sodium hydroxide, and many other common laboratory reagents, ensuring the flask remains sealed and safe during aggressive experiments.

How many autoclave cycles can the flask and cap endure?

Both the glass body and PTFE‑lined cap are designed for repeated autoclave sterilization. In testing, the flask has successfully completed over 50 autoclave cycles without loss of structural integrity or sealing performance, providing a long service life for routine laboratory use.

Can the flask be safely cleaned in a dishwasher?

Absolutely. The flask is top‑rack dishwasher safe, and the PTFE‑lined cap tolerates the high temperatures and detergents used in standard dishwasher cycles. For best results, place the flask on the top rack and avoid abrasive cleaning agents that could scratch the glass surface.

What warranty or after‑sales service does EISCO provide?

EISCO offers a one‑year limited warranty covering manufacturing defects in the glass and cap components. If you encounter any issues, our customer service team will assist with troubleshooting, replacement parts, or a full product exchange, ensuring you receive a reliable solution.