Flasks
Vessels used for containing liquids and performing mixing, heating, cooling, incubation, filtration, storage, distillation, volume measurement, and other common liquid handling processes.
The variety of laboratory flasks includes boiling flasks, cell culture flasks, distilling flasks, Erlenmeyer flasks, filtering flasks, freeze drying flasks, Kjeldahl flasks, recovery flasks, and volumetric flasks. Manufactured from a variety of materials, flasks are typically made of glass or plastic resins such as polystyrene, polypropylene, polycarbonate, polymethylpentene, or PTFE. Depending on their application, flasks can be sealed with various closures, including air-tight screw caps, vent caps, and stoppers made of ground glass, glass, plastic, or rubber.
Laboratory flasks are found in most chemical, biological, clinical, and industrial laboratories and in a variety of other workplace settings. They are available in a range of capacities ranging from 10 mL up to 10 L. Depending on the type, they may be supplied with a jointed ground glass top, a glass or plastic stopper, or a screw top.
What Styles of Laboratory Flask Are Available?
• Erlenmeyer flasks are conical and are used for a wide range of purposes; they are graduated and available in narrow-neck or wide-neck versions
• Büchner flasks are also conical, but with a side-arm to accept tubing for vacuum applications and extra-thick walls for increased strength when operating under reduced pressure
• Round-bottomed flasks, including retort and Kjeldahl flasks, are used in chemistry laboratories for reaction, digestion, or heating, and may have up to three necks for connecting to inlet/outlet tubing and other vessels
• Volumetric flasks are used to prepare standard solutions. They are supplied with precise, one-mark graduations and a stopper, and are designated as Class A or Class B depending on their accuracy. Standard measuring flasks are also offered for less critical measurements
• Cell culture flasks are often supplied with specialized cell-adherent treated surfaces and vented filters. They are normally sterile and may have baffled bases for improved aeration during agitation
United Scientific™ Class B Volumetric Flask with Glass Stopper
Volumetric Flasks offering quality and value for the lab.
Eisco™ Conical Filtering Flask with Integral Screw Thread Side Arm
High quality borosilicate 3.3 glass conical filtering flasks with integral plastic screw thread side arms. Conical shape provides stability, screw thread allows tight connections with other glassware.
Eisco™ Class B Glass Volumetric Flask with Glass Stopper
Class B Glass Volumetric Flask with Glass Stopper features a single graduation and blue markings.
Eisco™ Narrow Neck Glass Erlenmeyer Flasks
Eisco™ Narrow Neck Glass Erlenmeyer Flasks feature interchangeable joints and have superior chemical resistance.
Eisco Labs Amber Volumetric Flask with Polyethylene Stopper and QR Code
Class A Amber Volumetric Flask is made from durable borosilicate glass, has a secure polyethylene stopper, and features a QR code for certification — ideal for precise lab work and safe handling of light-sensitive solutions.
Eisco™ Glass Round Bottom Distilling Flasks with Oblique Neck
Round bottom distilling flasks made from high quality borosilicate glass. Designed with 1 oblique jointed neck as per DIN12383 standard. Autoclavable.
Eisco™ Round Bottom Distillation Flasks with Side Arm
High quality borosilicate 3.3 glass round bottom distillation flasks with integral side arms
United Scientific™ Erlenmeyer Flask, 24/40 Joint
Made from ASTM E-438 Type-1 Class A, Borosilicate 3.3 glass
United Scientific™ Class A Volumetric Flask with Glass Stopper, Batch Certified
Volumetric Flasks offering quality and value for the lab.
United Scientific™ Borosilicate Glass Narrow Mouth Erlenmeyer Flasks
Borosilicate glass narrow mouth Erlenmeyer flasks are designed to give the best combination of thermal shock resistance and physical strength.
United Scientific™ Borosilicate Glass Wide Mouth Erlenmeyer Flask
Wide Mouth Erlenmeyer Flasks ideal for titrations and culture work.
DWK Life Sciences Kimble™ ValueWare™ Volumetric Flasks, Class A
Calibrated To Contain.
Eisco™ Glass Buchner Filtering Flasks
High Quality borosilicate 3.3 glass Buchner filtering flasks available in a variety of socket sizes
Eisco™ Round Bottom Boiling Flasks with Interchangeable Joint
High quality borosilicate 3.3 glass round bottom boiling flasks with interchangeable joints feature ground joints and necks with standard socket sizes
United Scientific Supplies Class A Amber Volumetric Flasks Wide Mouth, Individually Certified, QR Coded
Amber Wide Mouth Volumetric Flasks are Class A Serialized and feature a QR Code for easy access to documentation.