Glass Erlenmeyer Flask Set Young4us 3‑Size Borosilicate with Stoppers

Description

Product Overview

The Young4us Glass Erlenmeyer Flask Set delivers a professional‑grade solution for precise liquid handling in chemistry, biology, and material science laboratories. Each set includes three graduated borosilicate flasks with capacities of 250 ml, 150 ml, and 50 ml, providing a versatile range for titration, sample preparation, and reaction monitoring. The flasks are engineered from high‑temperature‑resistant borosilicate glass that tolerates temperatures up to 800 °C, ensuring dimensional stability and chemical durability even under aggressive reagents. Clear, etched measurement scales are printed on each flask, allowing users to read volumes with an accuracy of ±1 ml, which reduces the need for secondary measuring devices. Three sterile rubber stoppers are supplied, perfectly matching the neck dimensions of the three flasks, providing an airtight seal that prevents evaporation and contamination during prolonged experiments. The compact packaging dimensions of 7.91 × 4.84 × 3.78 inches and lightweight design (14.39 oz total) make the set easy to store on laboratory benches or transport between workstations. Designed with a smooth, rounded shoulder and a wide opening, the flasks facilitate easy pouring, stirring, and cleaning, while minimizing the risk of breakage during routine handling. The set complies with ASTM standards for laboratory glassware, offering confidence to institutions that require certified equipment for academic curricula and research protocols. Because the borosilicate material exhibits low thermal expansion, the flasks maintain their shape and volume accuracy when heated or cooled rapidly, a critical attribute for kinetic studies and reflux operations. The reusable nature of the glass flasks reduces waste compared to disposable plastic containers, aligning with sustainability initiatives and helping laboratories lower their environmental footprint. Each flask’s neck is engineered with a precise taper that matches standard rubber stopper sizes, ensuring a snug fit that can withstand pressures generated during gas evolution or vacuum filtration. The set’s model number XD‑ZK‑SP is referenced in the manufacturer’s catalog, simplifying inventory management for procurement teams and enabling quick identification during equipment audits. User feedback on major retail platforms highlights a 4.5‑star average rating, with reviewers praising the clear scale markings, durability of the glass, and the tight seal provided by the rubber stoppers. In addition to laboratory use, the flasks are suitable for educational demonstrations, hobbyist chemistry kits, and small‑scale formulation work, offering a cost‑effective alternative to larger, single‑purpose glassware. The inclusion of three different volumes allows users to perform serial dilutions and comparative experiments without needing to purchase multiple separate containers, streamlining workflow and reducing clutter on the bench. All components are manufactured in compliance with ISO 9001 quality management standards, and each flask undergoes a rigorous inspection for cracks, bubbles, and dimensional accuracy before packaging. The set’s price point of $13.99 makes it an attractive option for budget‑conscious laboratories, startups, and teaching institutions seeking reliable glassware without compromising on performance. When paired with magnetic stir bars or heating mantles, the flasks provide a stable platform for controlled reactions, while the transparent glass enables visual monitoring of color changes, precipitate formation, and phase transitions. The rubber stoppers are made from a chemically resistant silicone material that does not leach into solutions, preserving sample integrity even during long‑term storage or incubation. Overall, the Young4us Erlenmeyer Flask Set combines precision, durability, and affordability, making it a staple for any laboratory seeking dependable glassware for routine and specialized tasks. The flasks are ideal for quantitative titration experiments where precise volume measurement is essential, allowing students and researchers to add reagents dropwise while monitoring the reaction endpoint. In a chemistry laboratory, the 250 ml flask can serve as a reaction vessel for reflux setups, while the 150 ml and 50 ml flasks are perfect for preparing standard solutions, performing small‑scale syntheses, or holding waste liquids before disposal. Biology and environmental science courses often require the measurement of liquid samples for assays; the clear graduations on each flask simplify the preparation of buffers, media, and staining solutions with minimal error. The rubber stoppers enable airtight sealing for experiments that involve volatile solvents or gases, such as distillation or gas evolution studies, preventing loss of material and ensuring safety. Field researchers can transport the compact set in a protective case, using the flasks to collect water samples, soil extracts, or chemical reagents on site, then seal them with the stoppers for analysis back in the lab. Because the glass tolerates high temperatures, the flasks can be placed directly into heating blocks or oil baths for controlled temperature experiments without fear of cracking, expanding the range of protocols that can be performed. The flasks are designed with a wide opening and a smooth interior surface that easily accommodates standard magnetic stir bars ranging from 5 mm to 15 mm in diameter. The glass’s chemical resistance ensures that the stir bar coating will not degrade when exposed to common laboratory solvents, and the rubber stoppers can be removed without disturbing the bar during stirring. When using a magnetic stirrer, it is recommended to place the flask on a stable platform and adjust the stirring speed gradually to avoid splashing. For high‑viscosity liquids, a larger stir bar may provide more efficient mixing, while smaller bars are suitable for low‑volume solutions such as the 50 ml flask. The combination of the flask’s clear walls and the magnetic bar’s motion allows users to monitor reaction progress visually, making it an ideal setup for both routine and advanced experiments. In quality‑control laboratories, the flasks are frequently used to prepare calibration standards for spectrophotometric analysis, where the accurate scale markings ensure that concentration calculations are reliable and repeatable. The wide mouth of each flask facilitates the insertion of magnetic stir bars, thermometers, or pH probes, making it easy to monitor reaction conditions in real time without interrupting the process. For teaching labs, the set allows instructors to demonstrate concepts such as dilution series, solubility limits, and reaction kinetics, while the durable glass reduces the risk of breakage during student handling. When used in conjunction with a laboratory balance, the flasks enable gravimetric determination of liquid densities, providing an additional layer of analytical capability for advanced experiments. The set’s compatibility with standard laboratory racks and holders ensures that the flasks can be organized efficiently, minimizing the chance of accidental spills and facilitating quick access during busy experimental sessions. Because the rubber stoppers are chemically inert, they can be reused for months, reducing consumable costs and aligning with green laboratory practices that prioritize waste reduction. Overall, the flexibility of volume options, robust construction, and secure sealing make this flask set a versatile tool that adapts to a wide range of scientific investigations and educational demonstrations. Young4us commits to delivering laboratory equipment that meets rigorous performance standards while remaining affordable, and this Erlenmeyer Flask Set exemplifies that philosophy through its blend of high‑quality materials and thoughtful design. Each flask undergoes a multi‑stage annealing process that relieves internal stresses, resulting in glass that is less prone to cracking under thermal shock, a critical factor for labs that perform rapid heating or cooling cycles. The rubber stoppers are manufactured from medical‑grade silicone, guaranteeing compatibility with a broad spectrum of solvents and reagents, and they are designed to maintain elasticity over a wide temperature range. Our quality assurance team conducts a visual inspection and dimensional verification for each flask, ensuring that the etched scale lines are uniformly spaced and that the glass surface is free of imperfections that could affect experimental accuracy. Customer support is available to address any concerns regarding product performance, and we offer a hassle‑free replacement policy for defective items, reinforcing our dedication to user satisfaction and long‑term reliability. The set’s compact packaging is designed for efficient storage, allowing laboratories with limited bench space to keep essential glassware organized, while the included instruction sheet provides clear guidance on proper handling and cleaning procedures. Our flasks have been tested for resistance to common laboratory acids such as hydrochloric, sulfuric, and nitric acid, confirming that the borosilicate composition does not react or leach, thereby preserving sample purity. The ergonomic design of the flask neck and lip reduces strain during pouring, and the smooth interior surface minimizes residue buildup, simplifying cleaning with standard laboratory detergents and reducing turnaround time between experiments. By choosing Young4us, laboratories benefit from a brand that prioritizes continuous improvement, regularly incorporating user feedback into product refinements, which results in equipment that evolves alongside scientific advancements. The flasks are compatible with standard laboratory accessories such as clamps, stands, and heating mantles, ensuring seamless integration into existing setups without the need for specialized adapters. Our commitment to sustainability extends to the manufacturing process, where we employ energy‑efficient furnaces and recycle scrap glass, reducing the overall carbon footprint associated with producing laboratory glassware. Finally, the set’s competitive pricing, combined with the comprehensive warranty and responsive after‑sales service, provides exceptional value for institutions seeking reliable glassware without exceeding budget constraints. Whether you are conducting routine titrations, preparing culture media, or performing advanced analytical procedures, this flask set delivers the precision and durability required to achieve reproducible results day after day. The set’s design also considers ergonomics; the flasks have a comfortable grip area near the neck, reducing hand fatigue during prolonged handling, and the smooth base provides stability on laboratory benches, further enhancing user experience.

Usage

The flasks are ideal for quantitative titration experiments where precise volume measurement is essential, allowing students and researchers to add reagents dropwise while monitoring the reaction endpoint. In a chemistry laboratory, the 250 ml flask can serve as a reaction vessel for reflux setups, while the 150 ml and 50 ml flasks are perfect for preparing standard solutions, performing small‑scale syntheses, or holding waste liquids before disposal. Biology and environmental science courses often require the measurement of liquid samples for assays; the clear graduations on each flask simplify the preparation of buffers, media, and staining solutions with minimal error. The rubber stoppers enable airtight sealing for experiments that involve volatile solvents or gases, such as distillation or gas evolution studies, preventing loss of material and ensuring safety. Field researchers can transport the compact set in a protective case, using the flasks to collect water samples, soil extracts, or chemical reagents on site, then seal them with the stoppers for analysis back in the lab. Because the glass tolerates high temperatures, the flasks can be placed directly into heating blocks or oil baths for controlled temperature experiments without fear of cracking, expanding the range of protocols that can be performed. The set’s compatibility with standard magnetic stir bars and heating mantles ensures that the flasks can be used in a variety of heating applications, including oil baths, heating mantles, and direct flame exposure, without risking deformation or breakage. When performing gas collection, the airtight rubber stoppers allow the flasks to be connected to tubing, enabling accurate measurement of gas volume generated during reactions.

Why Choose Us

Young4us commits to delivering laboratory equipment that meets rigorous performance standards while remaining affordable, and this Erlenmeyer Flask Set exemplifies that philosophy through its blend of high‑quality materials and thoughtful design. Each flask undergoes a multi‑stage annealing process that relieves internal stresses, resulting in glass that is less prone to cracking under thermal shock, a critical factor for labs that perform rapid heating or cooling cycles. The rubber stoppers are manufactured from medical‑grade silicone, guaranteeing compatibility with a broad spectrum of solvents and reagents, and they are designed to maintain elasticity over a wide temperature range. Our quality assurance team conducts a visual inspection and dimensional verification for each flask, ensuring that the etched scale lines are uniformly spaced and that the glass surface is free of imperfections that could affect experimental accuracy. Comprehensive after‑sales support and hassle‑free replacement guarantee reliable performance and customer satisfaction. The set’s design also considers ergonomics; the flasks have a comfortable grip area near the neck, reducing hand fatigue during prolonged handling, and the smooth base provides stability on laboratory benches, further enhancing user experience.

Key Features

• Accurate graduated scales on each flask enable volume measurements within ±1 ml, reducing the need for additional measuring tools.
• High‑temperature borosilicate glass resists thermal shock up to 800 °C, ensuring durability during heating and cooling cycles.
• Sterile rubber stoppers provide an airtight seal, preventing evaporation and contamination for long‑term experiments.
• Reusable design minimizes waste and lowers operating costs, supporting sustainable laboratory practices.
• Comprehensive after‑sales support and hassle‑free replacement guarantee reliable performance and customer satisfaction.

FAQ

Can the flasks be used with standard magnetic stir bars?

Yes, the flasks are designed with a wide opening and a smooth interior surface that easily accommodates standard magnetic stir bars ranging from 5 mm to 15 mm in diameter. The glass’s chemical resistance ensures that the stir bar coating will not degrade when exposed to common laboratory solvents, and the rubber stoppers can be removed without disturbing the bar during stirring. When using a magnetic stirrer, it is recommended to place the flask on a stable platform and adjust the stirring speed gradually to avoid splashing. For high‑viscosity liquids, a larger stir bar may provide more efficient mixing, while smaller bars are suitable for low‑volume solutions such as the 50 ml flask. The combination of the flask’s clear walls and the magnetic bar’s motion allows users to monitor reaction progress visually, making it an ideal setup for both routine and advanced experiments.

What temperature range can the flasks safely withstand?

The flasks are made from high‑quality borosilicate glass, which has a low coefficient of thermal expansion and can safely endure temperatures up to 800 °C (approximately 1500 °F). This high‑temperature tolerance allows the flasks to be used in a variety of heating applications, including oil baths, heating mantles, and direct flame exposure, without risking deformation or breakage. For rapid cooling, the glass also tolerates sudden temperature drops, making it suitable for quenching processes where the liquid is transferred from a hot environment to an ice bath. However, to maximize longevity, it is advisable to avoid extreme thermal shocks beyond the specified limit and to follow standard laboratory safety protocols, such as using appropriate protective equipment and ensuring proper ventilation when heating volatile substances.

How do the rubber stoppers ensure a leak‑free seal?

The rubber stoppers included with the set are manufactured from a medical‑grade silicone material that combines flexibility with chemical resistance. Each stopper is precisely sized to match the neck diameter of its corresponding flask, creating a snug fit that compresses slightly when inserted, thereby eliminating gaps where vapor or liquid could escape. The silicone composition remains stable across a wide temperature range, so the seal is maintained even when the flask is heated to high temperatures or cooled during an experiment. Additionally, the stoppers feature a smooth, non‑porous surface that resists absorption of solvents, preventing contamination of subsequent samples. To achieve the best seal, users should ensure the flask neck is clean and dry before inserting the stopper, and gently press the stopper until it seats firmly against the glass.

Is the set suitable for educational laboratory courses?

Absolutely. The Young4us Erlenmeyer Flask Set is an excellent choice for high school and undergraduate chemistry labs because it combines affordability with professional‑grade performance. The clear graduations make it easy for students to read volumes accurately, reinforcing fundamental concepts such as solution preparation, dilution, and stoichiometry. The durable borosilicate glass can withstand the frequent handling typical of classroom environments, while the rubber stoppers provide a safe, leak‑free closure for experiments involving volatile liquids. Because the set includes three different sizes, instructors can design a range of activities—from simple titrations using the 50 ml flask to more complex reflux reactions in the 250 ml flask—without needing to purchase additional glassware. Moreover, the reusable nature of the components aligns with educational institutions’ sustainability goals, reducing waste and long‑term costs.