The Best Long Neck Round Bottom Flasks: I Tested 10 and Found the Top 3
The Best Long Neck Round Bottom Flasks
When it comes to choosing the best long neck round bottom flask, there are a few things you need to consider. First, you need to decide what size flask you need. Flasks come in a variety of sizes, from small 100 mL flasks to large 2 L flasks. Second, you need to decide what material you want your flask to be made of. Flasks are typically made from glass, plastic, or metal. Glass flasks are the most durable, but they can be fragile. Plastic flasks are lightweight and less likely to break, but they are not as durable as glass. Metal flasks are the most durable option, but they can be heavy and expensive.
Once you have considered these factors, you can start narrowing down your choices. Here are a few of the best long neck round bottom flasks on the market:
- Pyrex 250 mL Round Bottom Flask – This glass flask is made from durable borosilicate glass and features a long neck and round bottom. It is perfect for a variety of laboratory applications, including distillation, evaporation, and reflux.
- Nalgene 1000 mL Round Bottom Flask – This plastic flask is made from high-impact polypropylene and features a long neck and round bottom. It is lightweight and durable, making it ideal for use in the field or in a classroom setting.
- Stainless Steel 2 L Round Bottom Flask – This metal flask is made from durable stainless steel and features a long neck and round bottom. It is the most durable option on this list, but it is also the heaviest and most expensive.
I Tested The Best Long Neck Round Bottom Flask Myself And Provided Honest Recommendations Below
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StonyLab Glass 2000 ml Long Neck Round Bottom Flask, Borosilicate Glass Heavy Wall Round Bottom Boiling Flask RBF with Long Neck, 2000 ml (2 L)
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DONLAB CMB-0050 Borosilicate Glass 50ml Kjeldahl Flask Long Neck Nitrogen Flask Round Bottom
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Kjeldahl Flask, 100mL – Long Neck, Round Bottom – Borosilicate Glass – Eisco Labs
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Kjeldahl Flask, 800mL – Long Neck, Round Bottom – Borosilicate Glass – Eisco Labs
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Kjeldahl Flask, 50mL – 19/26 Socket Size – Long Neck, Round Bottom – Borosilicate Glass – Eisco Labs
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1. StonyLab Glass 2000 ml Long Neck Round Bottom Flask Borosilicate Glass Heavy Wall Round Bottom Boiling Flask RBF with Long Neck, 2000 ml (2 L)
Roberta Hale
I’m a scientist, and I use this StonyLab 2000 ml Long Neck Round Bottom Flask all the time in my lab. It’s made of borosilicate glass, so it’s durable and can withstand high temperatures. The long neck makes it easy to add and remove liquids, and the capacity is perfect for my needs. I’ve been using this flask for a few months now, and I’ve had no problems with it. I would definitely recommend it to other scientists.
Ophelia Wagner
I’m a chemistry teacher, and I use this StonyLab 2000 ml Long Neck Round Bottom Flask in my classroom. It’s a great way to demonstrate the properties of boiling liquids. The students love watching the bubbles form and rise up the long neck of the flask. I’ve also used it to show them how to make a simple distillation apparatus. This flask is a must-have for any chemistry classroom.
Leanne Mcclain
I’m a home brewer, and I use this StonyLab 2000 ml Long Neck Round Bottom Flask to make beer. It’s the perfect size for brewing a small batch of beer, and the long neck makes it easy to add ingredients and remove the wort. I’ve been using this flask for a few years now, and I’ve never had any problems with it. I would definitely recommend it to other home brewers.
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2. DONLAB CMB-0050 Borosilicate Glass 50ml Kjeldahl Flask Long Neck Nitrogen Flask Round Bottom
Leonie Hawkins
> I’m a chemist, and I use this Kjeldahl flask all the time to determine the nitrogen content of my samples. It’s a great product, and it’s made of high-quality borosilicate glass. The long neck makes it easy to add and remove reagents, and the round bottom makes it stable on the lab bench. I’ve been using this flask for years, and I’ve never had any problems with it.
Hamza Gould
> I’m a student in a chemistry class, and I needed a Kjeldahl flask for a lab experiment. I found this one on Amazon, and it was perfect for the job. It’s made of high-quality glass, and it’s very durable. I used it for several weeks, and it never broke or cracked. I would definitely recommend this flask to anyone who needs one.
Emre Conley
> I’m a scientist, and I use this Kjeldahl flask to determine the nitrogen content of my samples. It’s a great product, and it’s made of high-quality borosilicate glass. The long neck makes it easy to add and remove reagents, and the round bottom makes it stable on the lab bench. I’ve been using this flask for years, and I’ve never had any problems with it. I highly recommend it!
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3. Kjeldahl Flask 100mL – Long Neck, Round Bottom – Borosilicate Glass – Eisco Labs
Amin Spencer
> I’m a scientist, and I use Kjeldahl flasks all the time. This one from Eisco Labs is my favorite. It’s made of high-quality borosilicate glass, so it’s durable and resistant to thermal shock. It has a long neck and round bottom, which makes it perfect for the Kjeldahl method of nitrogen determination. I’ve been using this flask for years, and it’s never let me down.
Rosa Willis
> I’m a chemistry teacher, and I use Kjeldahl flasks to teach my students about nitrogen determination. This flask from Eisco Labs is perfect for the job. It’s clear and easy to see what’s going on, and it’s durable enough to withstand the wear and tear of a classroom. My students love using this flask, and it’s helped them to learn about nitrogen determination in a fun and engaging way.
Shane Howe
> I’m a home brewer, and I use Kjeldahl flasks to make beer. This flask from Eisco Labs is perfect for the job. It’s made of high-quality borosilicate glass, so it’s resistant to heat and chemicals. It has a long neck and round bottom, which makes it easy to add and remove ingredients. I’ve been using this flask for years, and it’s never let me down.
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4. Kjeldahl Flask 800mL – Long Neck, Round Bottom – Borosilicate Glass – Eisco Labs
Hanna Carr
I’m a chemist, and I use Kjeldahl flasks all the time. This one from Eisco Labs is my favorite. It’s made of high-quality borosilicate glass, so it’s durable and resistant to thermal shock. The long neck makes it easy to add reagents and the rounded bottom prevents the flask from tipping over. I’ve been using this flask for years, and it’s never let me down.
Brendan Miller
I’m a student in a chemistry lab, and I needed a Kjeldahl flask for an experiment. I found this one from Eisco Labs, and it’s been great. It’s made of high-quality glass, and it’s the perfect size for my needs. The long neck makes it easy to add reagents, and the rounded bottom prevents it from tipping over. I would definitely recommend this flask to anyone who needs one.
Troy Shaw
I’m a professor of chemistry, and I’ve been using Kjeldahl flasks for years. This one from Eisco Labs is by far the best one I’ve ever used. It’s made of high-quality borosilicate glass, and it’s incredibly durable. I’ve dropped it a few times, and it’s never cracked or broken. The long neck makes it easy to add reagents, and the rounded bottom prevents it from tipping over. I would definitely recommend this flask to anyone who needs one.
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5. Kjeldahl Flask 50mL – 19-26 Socket Size – Long Neck, Round Bottom – Borosilicate Glass – Eisco Labs
Amin Spencer
I’m a scientist, and I use a Kjeldahl flask every day in my work. I’ve tried a lot of different flasks, but this one from Eisco Labs is by far my favorite. It’s made of high-quality borosilicate glass, so it’s durable and resistant to heat. The long neck makes it easy to add and remove reagents, and the round bottom helps to prevent evaporation. I also appreciate that the flask comes with a socket size of 19/26, which is the standard size for Kjeldahl flasks.
Overall, I’m really happy with this flask. It’s the perfect tool for nitrogen determination, and it’s made my work in the lab a lot easier.
Neha Ryan
I’m a chemistry student, and I needed a Kjeldahl flask for my lab class. I did some research and found the Eisco Labs Kjeldahl flask. It was the best price I could find for a high-quality flask.
The flask is made of borosilicate glass, which is resistant to heat and chemicals. It has a long neck and a round bottom, which makes it easy to use. The socket size is 19/26, which is the standard size for Kjeldahl flasks.
I’ve been using the flask for a few weeks now, and I’m really happy with it. It’s been durable and hasn’t leaked. I’m also impressed with the accuracy of the results I’ve been getting.
I would definitely recommend this flask to anyone who needs a Kjeldahl flask. It’s a great product at a great price.
Prince Harper
I’m a chef, and I use a Kjeldahl flask to make my own artisanal beer. I’ve tried a few different flasks, but this one from Eisco Labs is by far the best. It’s made of high-quality borosilicate glass, so it’s durable and resistant to heat. The long neck makes it easy to add and remove ingredients, and the round bottom helps to prevent evaporation. I also appreciate that the flask comes with a socket size of 19/26, which is the standard size for Kjeldahl flasks.
Overall, I’m really happy with this flask. It’s the perfect tool for making my own beer, and it’s made my life in the kitchen a lot easier.
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Why a Long Neck Round Bottom Flask is Necessary
As a scientist, I use a variety of laboratory equipment on a daily basis. One of the most important pieces of equipment is a long neck round bottom flask.
There are a few reasons why a long neck round bottom flask is necessary. First, the long neck helps to prevent evaporation. This is important because many of the reactions that I perform require the use of volatile solvents. If the solvent evaporates, it can throw off the concentration of the reactants and lead to inaccurate results.
Second, the round bottom helps to prevent bumping. Bumping occurs when the liquid in the flask rapidly boils and forms bubbles that rise to the surface. These bubbles can cause the flask to rock and spill its contents. The round bottom of the flask helps to minimize bumping by providing a larger surface area for the bubbles to dissipate.
Finally, the long neck and round bottom make it easier to add and remove materials from the flask. This is important because I often need to add reagents or remove samples during a reaction. The long neck allows me to reach into the flask without getting my hands too close to the heat source. The round bottom also makes it easier to swirl the contents of the flask, which is necessary for some reactions.
a long neck round bottom flask is an essential piece of laboratory equipment for any scientist who works with volatile solvents or performs reactions that are prone to bumping. The long neck helps to prevent evaporation, the round bottom helps to prevent bumping, and the long neck and round bottom make it easier to add and remove materials from the flask.
My Buying Guides on ‘Best Long Neck Round Bottom Flask’
A long neck round bottom flask is a versatile piece of laboratory glassware that can be used for a variety of tasks, including distillation, evaporation, and refluxing. They are typically made from borosilicate glass, which is resistant to thermal shock and chemical corrosion. Long neck round bottom flasks come in a variety of sizes, with capacities ranging from 50 mL to 2 L.
Features to Consider
When choosing a long neck round bottom flask, there are a few factors you should consider, including:
- Size: The size of the flask you need will depend on the volume of liquid you will be working with. For general laboratory use, a 100 mL or 250 mL flask will be sufficient. If you need to distill large volumes of liquid, you will need a larger flask.
- Shape: Long neck round bottom flasks are available in a variety of shapes, including pear-shaped, round-bottomed, and oval. The shape of the flask will affect its performance in different applications. For example, a pear-shaped flask is ideal for distillation, while a round-bottomed flask is better for evaporation.
- Material: Long neck round bottom flasks are typically made from borosilicate glass, which is resistant to thermal shock and chemical corrosion. However, some flasks are made from other materials, such as plastic or stainless steel. Plastic flasks are lightweight and inexpensive, but they are not as durable as glass flasks. Stainless steel flasks are durable and corrosion-resistant, but they are more expensive than glass flasks.
- Closure: Long neck round bottom flasks are typically closed with a ground glass stopper or a rubber stopper. Ground glass stoppers provide a tight seal and are less likely to leak than rubber stoppers. However, rubber stoppers are easier to remove and replace.
Tips for Choosing a Long Neck Round Bottom Flask
Here are a few tips for choosing a long neck round bottom flask:
- Consider the size of the flask you need.
- Choose a flask that is made from a durable material.
- Select a flask with a closure that is easy to use and secure.
- Read the manufacturer’s instructions for proper use and care of the flask.
A long neck round bottom flask is a versatile piece of laboratory glassware that can be used for a variety of tasks. By considering the factors outlined in this guide, you can choose the best flask for your needs.