Flasks

Laboratory Flasks That Actually Work When You Need Them

You know that feeling when you're halfway through a synthesis and realize your flask isn't up to the job? Yeah, we've all been there. Our flask collection covers everything from basic volumetric work to complex distillations, so you're not scrambling through the Products catalog at the last minute looking for the right piece of Laboratory glassware.

Reliable Laboratory Flasks for Synthesis and Experimentation

We've organized our flasks by what you're actually trying to do in the lab, not just by shape. Whether you're measuring, mixing, or running reactions, the right flask makes your day so much easier. All our borosilicate glass pieces handle thermal shock like champs—you can go from -70°C to +500°C without worrying about cracks. Last week I watched a colleague pull a round-bottom straight from liquid nitrogen and drop it in a warm water bath without even thinking about it. That's the kind of reliability you need when you're focused on your chemistry, not your glassware.

Flask Geometry and Heat Distribution Characteristics

Round-bottom flasks distribute heat evenly across their curved surface, which matters when you're refluxing something temperamental or running vacuum distillations. The spherical design handles pressure changes better than flat geometries—critical when you're working below 10 torr. They need support rings or clamps since they won't stand on their own, but that's a small trade-off for superior thermal performance.

Flat-bottom Erlenmeyer flasks sit stable on benchtops and stirrer plates without clamps for routine mixing. I use these constantly for media prep because they're autoclavable and stack nicely in the sterilizer. They're less efficient for heating compared to round-bottoms, but when you're just dissolving reagents or doing shake flask cultures, the convenience wins. Unlike Bottles or jars and packaging meant for storage, Erlenmeyers have wider mouths that make adding solids way easier.

Neck Configurations for Different Connection Needs

• Single-neck flasks: Standard for simple distillations and reflux setups with our laboratory Equipment like condensers and addition funnels
• Two-neck designs: One neck for thermometer or nitrogen line, other for reagent addition—saves you from breaking vacuum
• Three-neck configurations: Run complex reactions with simultaneous stirring, temperature monitoring, and reagent feeds
• Standard taper joints (14/20, 19/22, 24/40): Compatible across manufacturers so you're not hunting for proprietary adapters at 9pm

Angled side necks on multi-neck flasks make adding reagents way less awkward than trying to pour through vertical openings. Trust me, your back will thank you during long synthesis runs.

Volume Accuracy and Calibration Standards

Class A volumetric flasks are your go-to when accuracy matters—we're talking ±0.1% tolerance here, which beats most storage containers by a mile. Capacities from 25ml to 2000ml with ISO 4797 compliance mean your dilutions are actually what you think they are. Precision-molded necks seal properly with stoppers, and permanent graduation marks won't fade after repeated autoclave cycles.

Works great with our Chemicals range—acids, bases, organic solvents, you name it. Pro tip: if you're just doing rough prep work, save the volumetric flasks for final dilutions and use regular containers for intermediate steps. Heavy-wall construction on our reaction flasks handles vacuum work down to 1 torr without collapsing, which matters when you're doing rotary evaporation or short-path distillations.