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The 8 Best science lab kjeldahl flasks of 2025

Are you trying to find science lab kjeldahl flasks among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!

We investigated and evaluated a number of the top-selling science lab kjeldahl flasks on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 14 hours of research and did 48 science lab kjeldahl flasks tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!

An overview of our top picks

Table of contents

The best science lab kjeldahl flasks you can buy today

No. 1
EISCO Kjeldahl Flask, 500mL - Long Neck, Round Bottom - Borosilicate Glass
  • Designed for nitrogen determination as per Kjeldahl method
  • Made of high quality Borosilicate glass
  • 500mL capacity
  • Rounded Base
  • Conforms to DIN ISO 12360 standard
No. 3
EISCO Kjeldahl Flask, 800mL - Long Neck, Round Bottom - Borosilicate Glass
  • Designed for nitrogen determination as per Kjeldahl method
  • Made of high quality Borosilicate glass
  • 800mL capacity
  • Rounded Base
  • Conforms to DIN ISO 12360 standard
No. 4
EISCO Kjeldahl Flask, 50mL - 19/26 Socket Size - Long Neck, Round Bottom - Borosilicate Glass
  • Designed for nitrogen determination as per Kjeldahl method
  • Made of high quality Borosilicate glass
  • 50mL capacity
  • Socket size: 19/26
  • Conforms to DIN ISO 12360 standard
No. 5
stonylab Kjeldahl Flask, Heavy Wall Long Neck Lab Flask Borosilicate Glass Round Bottom Kjeldahl Flask with 24/40 Standard Taper Outer Joint, 500 ml
  • StonyLab Kjeldahl Flask is commonly used as an air condenser during digestion stage and reduces entrainment during the distillation stage of the Kjeldahl process; ideal for determination of nitrogen, etc
  • Capacity: 500 ml
  • With 24/40 standard taper outer Joints
  • Made of borosilicate glass; heavy duty, heavy all and durable
  • Warranty: StonyLab 1-Year Limited Warranty; if received damaged, please contact us immediately; we will solve it until satisfied
No. 6
EISCO Kjeldahl Flask, 800mL - 24/29 Socket Size - Long Neck, Round Bottom - Borosilicate Glass
  • Designed for nitrogen determination as per Kjeldahl method
  • Made of high quality Borosilicate glass
  • 800mL capacity
  • Socket size: 24/29
  • Conforms to DIN ISO 12360 standard
No. 7
PYREX Narrow Mouth Erlenmeyer Flask with Heavy Duty Rim - Borosilicate Glass Flask – Premium Glass Chemistry Flask for Laboratory, Classroom or Home Use - PYREX Chemistry Glassware, 1L, 1/Pk
  • LABORATORY FLASK: This narrow mouth conical borosilicate glass flask is ideal chemistry glassware for use in laboratories, schools, and for home and STEM activities and experiments.
  • SAFE & DURABLE: Offering superior heat, chemical and thermal shock resistance, the flat bottom lab glassware with heavy duty rim delivers premium strength and will not shatter easily.
  • CLEAR METRIC MARKINGS: A graduated metric scale in white enamel makes it easy to measure liquids and approximate contents, and the lab glass flask has a large labelling area.
  • EASY TO CLEAN: The reusable glass scientific flasks are easy to clean and can be sterilized safely in autoclaves at 121°C, making them ideal for repeated use in busy lab environments.
  • PYREX GLASSWARE: PYREX scientific glassware has been a trusted partner for chemists and research scientists in the toughest laboratory environments for more than 100 years.
No. 8
Young4us Glass Erlenmeyer Flask Set, (250 ml, 150 ml & 50 ml) Graduated Borosilicate Glass Erlenmeyer Flasks with Rubber Stoppers & Accurate Scales for Lab, Experiment, Chemistry, Science Studies etc
  • 3 RUBBER STOPPERS INCLUDED: This set has 3 rubber stoppers for these 3 Erlenmeyer Flasks, which are sterile & can seal the liquid in the flasks perfectly for experiment.
  • ACCURATE SCALES: 3 Erlenmeyer Flasks in different sizes (250ml 150ml 50ml) have clear and accurate scales for you to measure liquid efficiently & accurately without any problem.
  • SIGNIFICANT FEATURES: Reusable, environmental friendly, will not shatter easily, easy to clean, high temperature resistance, for laboratory, chemistry, science experiment, liquid measuring, etc.
  • HIGH-END MATERIAL FOR LAB: These Borosilicate Glass Erlenmeyer Flasks have High chemical durability and low thermal expansion, which can withstand the temperature under 800 °C (~1500 °F).
No. 9
9 Pack Glass Erlenmeyer Flask Set with Glass Stirring Rod, 7 Sizes, 50ml, 100ml, 150ml, 200ml, 250ml, 300ml, 500ml, Borosilicate Glass Erlenmeyer Flasks with Printed Graduation for Lab Chemistry
  • Package Includes: you will get 7 glass erlenmeyer flasks and 2 glass stirring rods, the erlenmeyer flasks have 7 different capacity, 50ml, 100ml, 150ml, 200ml, 250ml, 300ml, 500ml, easy to measure and use different volumes of liquid, the stirring rod can also make better convenience for experiments
  • Quality Material: the lab erlenmeyer flasks are well designed with quality borosilicate glass with uniform wall thickness, they are heavy duty, reusable and not easy to break
  • Good Heat and Chemical Resistance: the erlenmeyer flask set can withstand high temperature, and they can be heated on a hot plate, flame, oven, microwave or heating mantle, nice chemical durability and heat resistance ensure you can experiment without risk of damage
  • Clear Scale: each erlenmeyer flask has clear and accurate scales on the sides, allowing you to measure and store data more efficiently
  • Laboratory and Chemistry Glassware: the erlenmeyer flasks with rods are suitable for a variety of occasions, including scientific experiments and liquid measurements in professional laboratories, schools and homes; The fine workmanship and safe materials will make chemistry and science experiments easy and successful
No. 10
Utile Glass Erlenmeyer Flask Set, 250ml Narrow Mouth Erlenmeyer Flasks, 6pcs of Borosilicate 3.3 Glass Conical Flasks for Laboratory with Printed Graduation, 4016.0250.6
  • 250mL Capacity: 6pcs of 250ml lab glass Erlenmeyer conical flasks in total.
  • Industrial Strength: These flasks are made of 3.3 Borosilicate glass material, uniform wall thickness, high quality and heavy duty.
  • Conical Type and Narrow Mouth: These flasks are narrow mouth in conical type, with printed graduation and extra large marking spot.
  • Good Heat and Chemical Durability: These flasks will withstand repeated standard autoclave cycles of 121°C at 15 psi for 5 minutes, they are designed for heating by hot plate, flame, oven, microwave or heating mantle.
  • Designed for use in professional laboratories, also ideal for classroom and home daily use.
No. 12
Peohud Set of 10 Scientific Plastic Erlenmeyer Flasks, Narrow Mouth Erlenmeyer with Screw Caps, Lab Erlenmeyer Flask with Molded Graduations(50ml, 100ml, 250ml, 500ml, 1L)
21 Consomer Reviews
Peohud Set of 10 Scientific Plastic Erlenmeyer Flasks, Narrow Mouth Erlenmeyer with Screw Caps, Lab Erlenmeyer Flask with Molded Graduations(50ml, 100ml, 250ml, 500ml, 1L)
  • Smart Package: You will get 10 pack flasks, 2 x 50ml: 2" x 3", 2 x 100ml: 2.5" x 4" , 2 x 250ml: 3" x 5.5" , 2 x 500ml:4" x 7" , 2 x 1L: 5" x 8.5".
  • Practical Design: Our narrow mouth Erlenmeyer with screw caps makes sure the liquid inside does not overflow and PP material prevents being shattered.
  • High Quality Material: Peohud Erlenmeyer flasks are made of premium polypropylene material which is durable and can be used for a long time.
  • Easy to See What Inside: The translucent wall and the graduation line enable users to clearly see the liquid and liquid level, which is very helpful in the experiment.
  • Wide Application: These scientific conical flasks are suitable for the mixing and preparation of any sample, can be used to store chemicals, mixtures and kitchen seasoning.
No. 13
HUAOU 3pcs Glass Erlenmeyer Flask Set, 50ml 150ml 250ml Laboratory Flask with Stopper, Lab Chemistry 3.3 Borosilicate, Narrow Mouth, Printed Graduation, Conical Flask with Cleaning Brush
  • Multiple Sizes: Include 1pc cleaning brush + 3pcs labware flasks in varying capacities. 50ml/1.7oz - 1.96in(50mm) x 3.54in(90mm); 150ml/5oz - 2.75in(70mm) x 4.53in(115mm); 250ml/8.45oz - 3.26in(83mm) x 5.51in(140mm), ensuring you have the right size for any tasks.
  • Premium Material: Type I requirements, Type 1 Class A 3.3 Borosilicate Glass, ASTM Specification E960. Heavy-duty rim, narrow mouth, printed graduation and large label area, erlenmeyer flasks are durability and precision, against corrosive acids and alkalis, ensure accurate measurement and safety performance in experiment.
  • Stable Design: Science glassware flask sets can withstand high temperature, making them suitable for heating on hot plates, flames, ovens, microwaves. Flask kits chemical resistance ensures safe experimentation without the risk of damage.
  • Widely Application: Bottles with lid can be used for professional scientific experiment and school classroom lab, also suitable for food container, candy storage, plant propagation, yeast culture, decanter. Party supplies for Christmas, Halloween, kids birthday, wedding, science themed party.
No. 14
Plastic Erlenmeyer Flask 50ml 100ml Laboratory Chemical Erlenmey Students Kids Education Learning Tool
43 Consomer Reviews
Plastic Erlenmeyer Flask 50ml 100ml Laboratory Chemical Erlenmey Students Kids Education Learning Tool
  • Mad scientist props,50ml: 81 X 53mm,100ml: 102 X 64mm
  • Triangle flask scale mark,stereo clear,easy to use.
  • Chemistry flask preferred PP material,can withstand 121℃ high temperature,acid and alkali corrosion resistance,strong.
  • Beaker set very sturdy plastic,could reuse for many years,worked well for potion decorations.
  • Use them in your home school science class,they are perfect for your needs.They are not breakable when they fall.
No. 15
Labvida 6pcs of Narrow Mouth Glass Erlenmeyer Flasks, Vol.150ml, 3.3 Borocilicate with Printed Graduation, LVC002
  • Volume: 150ml (5.1oz)
  • Material: Made of high quality 3.3 Borosilicate glass, Uniform wall thickness
  • Convenient to use: Printed graduation, Extra large marking spot
  • Tolerance: approximately +/- 5%
  • Meet Standard Specification: ASTM Specification E960, Type I requirements
No. 17
Glass Narrow Mouth Erlenmeyer Flask Set (FGSET3) - 3 Sizes - 50, 150 and 250ml, United Scientific
  • Contains 1 each 50, 150 and 250ml Narrow Mouth Erlemeyer Flask
  • High quality inert 3.3 borosilicate glass
  • Heavy Duty Reusable
No. 18
Glass Flask Erlenmeyer Flask Set Narrow Mouth 2000ml Graduated Flasks
  • 100% SATISFACTION SERVICE: Our Erlenmeyer Flasks are made of high quality borosilicate glass. If they are any questions, please feel free to contact us, we will do our best to meet your satisfaction. Pls note that the stopper is very soft, you have to push hard to get in, only that it doesn't push out.
  • High Quality Borosilicate Glass: High temperature resistance. These borosilicate glass erlenmeyer flasks have High chemical durability and low thermal expansion.
  • Convenient to use: Suitable for beginners or professional use, also the students, convenient classroom borosilicate glass erlenmeyer flasks.
  • Clear Scale: Erlenmeyer Flasks have clear and accurate scales for you to measure liquid efficiently.
  • Neck Style: Narrow mouth. Conducted in a slow and careful manner to avoid breakage. Heavy Duty Reusable.
No. 20

How to choose a good science lab kjeldahl flasks

Does the idea of finding a fantastic science lab kjeldahl flasks make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!

Your presence here indicates that you are interested in science lab kjeldahl flasks. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top science lab kjeldahl flasks products available right now. You might be wondering how we came up with the list. How was this buying guide developed?

First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top science lab kjeldahl flasks on the market right now!

The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:

Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top science lab kjeldahl flasks brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.

Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top science lab kjeldahl flasks based on those.

Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.

Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.

Customer ratings:  Would it be accurate to suggest that the science lab kjeldahl flasks were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.

Customer Reviews: Like ratings,  provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.

Seller Rank: This is very intriguing! Not only do you need a good science lab kjeldahl flasks, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.

Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your science lab kjeldahl flasks.

Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting science lab kjeldahl flasks for months and years to come.

Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.

Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.

These are the standards by which we selected our science lab kjeldahl flasks. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.

Why should you believe us?

There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what science lab kjeldahl flasks should you purchase in 2022?

This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on science lab kjeldahl flasks.