The Erlenmeyer flask is a staple in scientific glassware and one of the world’s most recognizable pieces of equipment. Whether you’re growing a cell culture or performing a titration, the Erlenmeyer flask serves many purposes. It is helpful in a range of scientific settings.
But what is an Erlenmeyer flask, and how does it work? In this guide, we’ll teach you everything you need to know about this iconic flask. We will explain how they work, what they are used for, and how to maximize their effectiveness in your experiments.
What is an Erlenmeyer Flask?
The Erlenmeyer flask is a piece of laboratory glassware used to measures, mixes, transports, stores, cools, and boils liquids in the laboratory. Its unique conical shape makes it ideal for titrations, allowing easy mixing and simple storage.
The narrow necks of Erlenmeyer flasks make them perfect for stirring solutions without spillage. Their versatility, durability, and resistance to temperature change make them a valuable addition to almost all laboratory settings.
Emil Erlenmeyer, the German chemist, invented the flask’s design in the late 19th century.
If you’re interested in other essential lab glassware, check out what is a volumetric flask to learn about their design, function, and importance in precise measurements.
Difference between Erlenmeyer, conical, and titration flasks
Conical flasks, titration flasks, and Erlenmeyer flasks are the same. People use the terms interchangeably. ‘Conical flask’ is most common in British English, while ‘Erlenmeyer flask’ and ‘titration flask’ are common in the US.
Scientists use these flasks in various studies due to their versatility and ease of use.
Erlenmeyer flask designed and distinguished?
The conical body, flat bottom, and narrow neck that widens at the top distinguish Erlenmeyer flasks. This unique design enables easy pouring, swirling, and mixing.
The thin cylindrical neck allows you to easily seal the flask with a bung or rubber stopper. Many flasks also have vented closures, allowing gases to escape during boiling liquids or fermenting cultures, preventing pressure buildup. Most flasks have measurement markings on the side, indicating the volume of liquid in the flask.
The flask can have any number of markings, though most have a line every 25-50ml. Some bigger flasks that store large amounts of liquid may only have a marking every 100-200ml.
What is a flask made of borosilicate glass used for?
Manufacturers typically make the Erlenmeyer flask from borosilicate glass. This durable material offers excellent resistance to chemical corrosion and thermal shock. Borosilicate glass allows the flask to withstand rapid temperature changes, making it ideal for various laboratory experiments.
Plastic Erlenmeyer flasks (like this one) are also readily available in materials such as polypropylene. This strong, lightweight plastic is more resistant to temperature change and won’t shatter, making it useful for experiments requiring greater heat or corrosion resistance.
That said, some chemicals may react poorly with plastic flasks, affecting a researcher’s ability to take accurate measurements. For this reason, borosilicate glass flasks are still the most popular choice for everyday experiments.
Check the specific requirements of your experiment to determine which flask is best suited to your needs.
What is an Erlenmeyer flask size available?
Erlenmeyer flasks are available in many different sizes, making the flask suitable for a broad range of scientific applications. The most common flask sizes used in scientific studies are 25ml, 50ml, 100ml, 250ml, 500ml, and 1000ml. Some large flasks may even go up to 2000ml or 5000ml.
These are usually reserved for industrial purposes and aren’t typically suited to a standard laboratory. When choosing the correct flask size, consider the volume required for the application and the space needed for vigorous shaking. In most cases, choose a flask larger than the amount of liquid it will hold. This allows for effective stirring and prevents spillage.
Erlenmeyer flasks and beakers: what’s the difference?
Both beakers and Erlenmeyer flasks have their place in the laboratory, but their key differences make each suited to different functions. The main difference between flasks and beakers is their shape. The Erlenmeyer flask has a conical shape, while the beaker is cylindrical with flat sides.
A beaker also has a spout at the top to allow for easy pouring of liquids, whereas an Erlenmeyer flask does not. Use beakers for measuring, decanting, and transporting liquids. Their larger size and pouring spout make them well-suited for this purpose.
In contrast, use Erlenmeyer flasks for mixing and reacting, as their conical shape allows for easy and vigorous stirring. Erlenmeyer flasks can withstand more heat than standard beakers, making them ideal for exothermic reactions.
Erlenmeyer flask and volumetric flask differences?
Although the volumetric flask and Erlenmeyer flask are both excellent additions to any lab setting, they each have distinct characteristics that make them more suited to specific applications.
Volumetric flasks have a pear shape with a taller, narrower neck than Erlenmeyer flasks. Manufacturers design the volumetric flask to measure one volume accurately. In contrast, these flasks often have several graduated markings.
Erlenmeyer flasks are less precise than volumetric flasks. Manufacturers calibrate volumetric flasks to a high degree of accuracy, typically to the nearest 0.05ml (for class A flasks). In contrast, many Erlenmeyer flasks are only calibrated to the nearest 5%.
This means that a 100ml measurement on a class A volumetric flask will always fall within the range of 99.95ml-100.05ml. In contrast, an Erlenmeyer flask calibrated to 100ml could fall anywhere between 95ml and 105ml.
Volumetric flasks and Erlenmeyer flasks are ideal for scientific applications requiring high accuracy, such as preparing standard solutions or formulating liquids to a precise concentration. This flask suits experiments involving heating or boiling better since volumetric flasks cannot withstand rapid temperature changes.
How do you use an Erlenmeyer flask?
The unique shape and resistant qualities of this flask make it the perfect piece of lab equipment for everyday experiments. However, It serves various purposes for chemists, physicists, and biologists alike. Let’s look at some of the primary uses for this flask in scientific applications.
- Mixing chemical solutions: Commonly used for mixing and preparing solutions that don’t require a high degree of position. The flask suits experiments that require lots of agitation because the long neck prevents splashing when you swirl it.
- Forming microbial cultures: Commonly used to grow microbial cultures because of their large surface area and excellent aeration. In microbiological experiments, fit most flasks with a vented closure to allow for gas exchange during incubation.
- Heating experiments: Most can be heated directly on a high-quality hot plate because they resist thermal shock. This durability makes them an excellent tool for boiling or heating experiments.
- Titrations: Use the Erlenmeyer flask commonly for titrations, where you slowly add a solution of known concentration to a solution of unknown concentration. The conical shape of the flask reduces splashing, allowing it to be placed directly under a burette for greater precision.
- Fermentations: Used in biotechnology labs for the fermentation of microorganisms. The narrow neck of this type of flask reduces the risk of contamination, and vented closure allows gas to escape as the fermentation process takes place.
- Crystallization: Use for crystallization by preparing a solution in the flask and gradually cooling it to create crystals.
Sharpening cap or no sharpening cap?
There are two primary variations of Erlenmeyer flasks: those with a sharpening cap and those without. The sharpening cap is a small lid that fits over the top of the flask. It allows a pipette or needle to access the flask’s contents.
Unlike a typical bung or rubber stopper, the sharpening cap has a small piece of film. This film lets a pipette or needle access the flask’s contents. Sharpening caps provide a sterile way to access the contents without removing the lid.
This is crucial when you need to take or add multiple samples over time, reducing contamination or spillage.
However, producing and purchasing Erlenmeyer flasks with sharpening caps costs more. For experiments that don’t require high accuracy or need to be performed at scale, use a flask without a sharpening cap as a cost-effective alternative.
Erlenmeyer flask top tips used for accurate results
Now that we’ve detailed everything you need to know about the flask, let’s discuss how to use one. There are many different ways to use it, but these top tips can be applied to any experiment.
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Thoroughly clean your Erlenmeyer flask before each use using deionized or distilled water. Using regular soap and water could introduce impurities or residue into the flask, which may affect the accuracy of your experiment.
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Use a high-quality glass stirring rod to stir mixtures, promote even distribution, and prevent clumping.
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Be careful. Make sure to handle it with care, especially if your flask contains a corrosive liquid.
- Don’t overfill your flask. Filling to the brim can increase the likelihood that you will spill your solution. Buy a larger flask than needed to allow adequate headspace for shaking and heating.
Where can I find Erlenmeyer flasks?
Certified MTP offers a broad range of first-class Erlenmeyer flasks, volumetric flasks, beakers, pipettes, burettes, lab stirrers, water baths, incubators, and more.
We commit to providing our customers with only the highest quality products. We ensure that every use of our equipment produces accurate and reliable results for your scientific experiments.
Moreover, If you’d like to learn more about our range of high-quality products, browse our full range of flasks and other lab supplies. Want to ask us a question or ask us for a recommendation?
Get in touch. We’re always happy to help. Also view the full line of Volumetric Flasks, Filter Flasks, Glass Beakers, and Flasks, Beakers, Pipettes, & Graduated Cylinders
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