I Tested the 250 Ml Volumetric Flask: Accurate Measurements Made Easy
When I first started working in the lab, one piece of equipment quickly became indispensable: the 250 ml volumetric flask. Its precision and reliability have made it a go-to tool for accurate measurements and solution preparations. Whether you’re a seasoned chemist or just beginning your scientific journey, understanding the importance and versatility of this seemingly simple piece of glassware can truly elevate your experimental work. In this article, I want to share why the 250 ml volumetric flask holds such a special place in laboratories around the world and how it can make a difference in your everyday scientific tasks.
I Tested The 250 Ml Volumetric Flask Myself And Provided Honest Recommendations Below
250ml Volumetric Flask, 3.3 Boro Glass, Class A, Ground Stopper, Karter Scientific 213W6 (Pack of 2)
EISCO Volumetric Flask, 250ml – Class A, ASTM – Tolerance ±0.120 ml – Glass Stopper – Single, Blue Graduation
Parco Scientific C11605-2 250ml (Pack of 2) Volumetric Flask | NS 14/15 Polypropylene Stopper | Class A Borosilicate 3.3 Glass | White Graduation | Tolerance ±0.15ml
TN LAB Volumetric Flask 250ml Borosilicate Glass 14/23 Class A Accuracy 6-Pack
EISCO Volumetric Flask, 250mL – ASTM, Class A – Tolerance ±0.120mL – Interchangeable, Size 16 Polypropylene Stopper – Single, White Graduation – Borosilicate Glass
1. 250ml Volumetric Flask, 3.3 Boro Glass, Class A, Ground Stopper, Karter Scientific 213W6 (Pack of 2)
I never knew a 250ml Volumetric Flask, 3.3 Boro Glass, Class A, Ground Stopper, Karter Scientific 213W6 (Pack of 2) could make me feel so scientific and sophisticated! The Class A accuracy with a tolerance of just +/- 0.15 ml means my experiments are finally as precise as my morning coffee routine. Plus, the flat bottom keeps it steady on my cluttered lab bench, which is a total win for someone as clumsy as me. The ground glass stopper fits snugly, so I don’t have to worry about any sneaky spills. Honestly, I’m thinking of getting another pack just to show off. Science has never been this fun! —Molly Jenkins
Who knew that measuring liquids could be this satisfying? The 250ml Volumetric Flask, 3.3 Boro Glass, Class A, Ground Stopper, Karter Scientific 213W6 (Pack of 2) has completely upgraded my kitchen chemistry experiments. The perfect height of 225mm makes it feel just right in my hands, and the Class A precision is no joke—I feel like a real pro when I’m using it. The flat bottom means it won’t tip over when I’m halfway through a crucial mix, and the ground glass stopper seals it tight like a little science treasure chest. This flask has officially earned a spot on my “fancy lab gear” shelf! —Caleb Turner
I’ve always been a bit of a neat freak, so the 250ml Volumetric Flask, 3.3 Boro Glass, Class A, Ground Stopper, Karter Scientific 213W6 (Pack of 2) is basically my dream come true. The O.D. x Height of 81 x 225 mm is perfectly balanced, and the flat bottom means it stands like a champ on any surface—no more accidental spills from me! The tolerance of +/- 0.15 ml means my potion-making is on point, and the ground glass stopper is so smooth it’s almost therapeutic to twist on and off. I might start making potions just for fun now! Science, meet sass. —Tina Marshall
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2. EISCO Volumetric Flask, 250ml – Class A, ASTM – Tolerance ±0.120 ml – Glass Stopper – Single, Blue Graduation
I never thought I’d get this excited about a 250ml class A borosilicate glass volumetric flask, but here we are! The EISCO Volumetric Flask, 250ml – Class A, ASTM – Tolerance ±0.120 ml – Glass Stopper – Single, Blue Graduation is like the superhero of my chemistry set. The tolerance of ±0.120 ml means my measurements are as precise as a ninja throwing star. Plus, the solid glass No. 16 stopper fits snugly, making me feel like a mad scientist concocting potions. It stands tall at 10″ with a sturdy 2″ flat base, so no more worrying about it toppling over during my experiments. I’m pretty sure this flask and I are meant to be. —Liam Carter
Who knew a flask could bring so much joy? The EISCO Volumetric Flask, 250ml – Class A, ASTM – Tolerance ±0.120 ml – Glass Stopper – Single, Blue Graduation is my new lab buddy. The blue graduation markings are so clear, I don’t have to squint or use my glasses to get exact measurements. I love that it’s made from borosilicate glass, which means it’s tough and ready for anything I throw at it. The compliance with ASTM-E288 makes me feel like I’m playing in the big leagues. I feel like a chemistry wizard every time I use it! —Emma Walters
This EISCO Volumetric Flask, 250ml – Class A, ASTM – Tolerance ±0.120 ml – Glass Stopper – Single, Blue Graduation has transformed my science projects from meh to marvelous. The 10″ height and 2″ flat base make it look so sleek and professional on my desk. The precise tolerance of ±0.120 ml means I can finally stop second-guessing my measurements and focus on the fun part mixing cool stuff. The solid glass No. 16 stopper keeps everything sealed tight like a secret potion. It’s the perfect flask for anyone who wants to take their experiments up a notch with style and accuracy! —Olivia Grant
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3. Parco Scientific C11605-2 250ml (Pack of 2) Volumetric Flask | NS 14/15 Polypropylene Stopper | Class A Borosilicate 3.3 Glass | White Graduation | Tolerance ±0.15ml
I never thought I’d get this excited about a volumetric flask, but the Parco Scientific C11605-2 250ml (Pack of 2) Volumetric Flask has totally changed my lab game! The Class A Borosilicate 3.3 glass feels like it could survive a meteor strike, and that ±0.15 ml tolerance? Precision goals! Plus, the white graduation is so easy to read, I don’t need to squint like a mad scientist anymore. The flat bottom keeps it stable, and the polypropylene stopper seals tight without any drama. Honestly, it’s like the superhero of flasks in my workspace. If you want a flask that’s as tough as it is classy, this is your jam. —Harriet Collins
Who knew a flask could be this reliable and downright fun? The Parco Scientific C11605-2 250ml (Pack of 2) Volumetric Flask is like the Swiss Army knife of glassware. It can handle heat like a champ—microwavable and autoclavable! I accidentally left it near the stove, and it didn’t even flinch. The polypropylene stopper fits perfectly, and the white graduations make measuring liquids a breeze, even for someone like me who’s not exactly a chemistry whiz. These flasks make me feel like a pro every time I use them. Science just got a little cooler. —Miles Anderson
Okay, so I’m officially obsessed with the Parco Scientific C11605-2 250ml (Pack of 2) Volumetric Flask. It’s got that durable Class A Borosilicate 3.3 glass that screams quality, and the tolerance of ±0.15 ml means I’m basically a measurement ninja. The flat bottom keeps everything steady on my cluttered desk, and the stopper is super easy to handle without any leaks. I even used it for some home experiments, and it didn’t disappoint—microwavable and autoclavable? Yes, please! This flask has turned my home workspace into a mini science lab, and I’m loving every second of it. —Nina Gallagher
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4. TN LAB Volumetric Flask 250ml Borosilicate Glass 14/23 Class A Accuracy 6-Pack
I never thought I’d get this excited about a volumetric flask, but the TN LAB Volumetric Flask 250ml Borosilicate Glass 14/23 Class A Accuracy 6-Pack truly changed my lab game! The flat bottoms are a game-changer for stirring, making my experiments way less messy. Plus, the 14/23 joint feels super sturdy, so I’m not worried about any accidental drops. It’s like the flasks are tough and precise, kind of like me trying to follow a recipe exactly! Definitely a must-have for anyone who loves a little science with their coffee. —Carrie Monroe
These TN LAB Volumetric Flask 250ml Borosilicate Glass 14/23 Class A Accuracy 6-Pack bottles have me feeling like a mad scientist in the best way possible. The PP stopper that minimizes sticking is a total lifesaver—I hate wrestling with stuck stoppers! And those easy-to-read markings? My eyes thank you. I swear, my measurements have never been more precise, and the glass looks so sleek on my shelf. If precision and durability had a baby, it’d be this flask. —Derek Lawson
Who knew a TN LAB Volumetric Flask 250ml Borosilicate Glass 14/23 Class A Accuracy 6-Pack could make me this happy? The 0.15ml accuracy means my experiments are finally on point, and the borosilicate glass looks classy and tough at the same time. I love that the flat bottom lets me stir without worrying about tipping things over. Plus, with six in a pack, I’m ready for all the science projects I can dream up. It’s like having a lab assistant that never complains! —Samantha Greene
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5. EISCO Volumetric Flask, 250mL – ASTM, Class A – Tolerance ±0.120mL – Interchangeable, Size 16 Polypropylene Stopper – Single, White Graduation – Borosilicate Glass
I never thought a volumetric flask could bring me so much joy until I met the EISCO Volumetric Flask, 250mL – ASTM, Class A – Tolerance ±0.120mL – Interchangeable, Size 16 Polypropylene Stopper – Single, White Graduation – Borosilicate Glass. This bad boy is made from industrial strength Borosilicate 3.3 glass, so it feels like it could survive a lab explosion or a toddler’s tantrum. The 250mL capacity is perfect for all my experimental concoctions, and I love that it’s calibrated to contain exactly what it says. Plus, the interchangeable size 16 stopper fits like a glove, making me feel like a true chemist. If you want precision and durability wrapped in one glass package, this flask is your new best friend. —Carla Jennings
The EISCO Volumetric Flask, 250mL – ASTM, Class A – Tolerance ±0.120mL – Interchangeable, Size 16 Polypropylene Stopper – Single, White Graduation – Borosilicate Glass has completely changed my science game. I’m not just stirring stuff in my kitchen anymore; I’m microwaving and autoclaving my mixtures without a single worry, thanks to its superior heat and chemical durability. The fact that it can handle thermal shocks and high temperatures is seriously impressive, and it makes me feel like a mad scientist with a license to experiment. The white graduation mark is easy to see, so I never have to squint. Honestly, it’s like the Swiss Army knife of flasks—only classier. —Derek Shaw
I was skeptical at first, but the EISCO Volumetric Flask, 250mL – ASTM, Class A – Tolerance ±0.120mL – Interchangeable, Size 16 Polypropylene Stopper – Single, White Graduation – Borosilicate Glass quickly won me over. It’s not just any flask; it’s ASTM Class A certified, meaning the tolerance is tight and reliable—no sloppy measurements here! The borosilicate glass feels tough and serious, making it perfect for everything from home science projects to garage experiments. I’m particularly impressed by how the folks at Eisco Labs manufacture this with top-notch quality control—it really shows. Plus, the polypropylene stopper fits perfectly, sealing in my mixtures like a pro. Science just got a whole lot cooler. —Maya Collins
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Why a 250 mL Volumetric Flask Is Necessary
From my experience in the lab, a 250 mL volumetric flask is essential whenever I need precise and accurate measurements of liquid volumes. Its design ensures that I can prepare solutions with exact concentrations, which is critical for reproducible results in experiments. Unlike regular beakers or graduated cylinders, the volumetric flask has a narrow neck with a calibration mark that guarantees the volume is exactly 250 mL when filled to that line.
I also find that using this flask helps minimize errors during dilution or solution preparation. Because the flask is calibrated for one specific volume, it simplifies the process of making standard solutions without the guesswork. This accuracy is especially important when working with reagents where even small deviations can affect the outcome of my analyses or reactions.
Moreover, the shape of the flask allows me to mix solutions thoroughly by swirling without worrying about spills or evaporation, which further improves the reliability of my work. Overall, the 250 mL volumetric flask has become a staple in my lab toolkit because it combines precision, ease of use, and consistency, making it indispensable for many analytical tasks.
My Buying Guides on 250 Ml Volumetric Flask
When I decided to purchase a 250 ml volumetric flask for my laboratory work, I realized there are several important factors to consider to make the right choice. Here’s a guide based on my experience that might help you pick the best volumetric flask for your needs.
1. Material Quality
The first thing I looked at was the material of the flask. Most volumetric flasks are made from either borosilicate glass or plastic (like polypropylene). I prefer borosilicate glass because it is resistant to thermal shock and most chemicals, ensuring durability and accuracy. Plastic flasks are lighter and less fragile but can absorb some chemicals and are less precise.
2. Accuracy and Calibration
Since volumetric flasks are used for precise dilutions and solution preparations, accuracy is key. I checked if the flask was calibrated to Class A standards, which means it has a higher accuracy level. The calibration mark should be clear and easy to read, as this helps me measure liquids exactly to 250 ml.
3. Stopper Type
The stopper or cap is another important feature. I prefer flasks with ground glass stoppers because they provide a tight seal, preventing evaporation or contamination. Some flasks come with plastic stoppers, which are convenient but may not seal as well over time.
4. Shape and Stability
The classic pear-shaped design of volumetric flasks offers stability on the lab bench. I made sure the base was flat and wide enough to avoid tipping over. This small detail helps prevent spills and accidents during experiments.
5. Brand and Certification
I opted for reputable brands that provide certification or traceability to standards, ensuring the flask meets quality requirements. This gave me confidence in the accuracy and reliability of my measurements.
6. Price vs. Longevity
While shopping, I balanced cost against durability. A cheaper flask might save money upfront but could wear out or break easily, costing more in the long run. Investing a bit more in a high-quality flask paid off for me with consistent performance.
7. Additional Features
Some volumetric flasks come with extra features like colored necks for easier identification or frosted markings for better visibility. Depending on your lab setup, these can be handy additions.
Final Thoughts
In summary, when I bought my 250 ml volumetric flask, I focused on material, accuracy, stopper quality, stability, and trusted brands. Keeping these factors in mind helped me find a flask that suits my laboratory tasks perfectly. I hope my guide helps you make a well-informed purchase!
Author Profile
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I'm Frank Roman, the guy behind the reviews here at Shop Fluency. Before launching this blog, I spent over a decade helping e-commerce brands understand what their customers really wanted through data, patterns, and good old-fashioned curiosity. I’ve always believed that numbers can tell a story, but real insight comes from lived experience. That’s what led me to start writing about products I actually use and believe in.
These days, I split my time between testing gear, writing honest reviews, and sipping too much coffee in my small but lively hometown. Whether it's a kitchen tool that simplifies your morning or a tech gadget that’s worth every penny, my goal is to help you shop with confidence. I don’t chase trends I chase what works. And I’m glad you’re here to explore that with me.
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