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
Eisco™ Pear Shape Distilling Flasks
High quality borosilicate 3.3 glass pear shape distilling flasks feature short neck design with interchangeable joints.
Eisco™ Polypropylene Conical Flask with Screw Top
Break-resistant polypropylene conical flasks with a screw top are great, economical alternative for similar glass flasks.
Eisco™ Class A Glass Volumetric Flasks with Snap Cap
Eisco™ Class A Glass Volumetric Flasks with Snap Cap features a flat bottom design, single graduation, and white print markings.
Eisco™ Flat Bottom Boiling Flasks with Interchangeable Joint
High quality borosilicate 3.3 glass flat bottom boiling flasks feature short necks and interchangeable joints.
United Scientific™ Borosilicate Glass Wide Mouth Erlenmeyer Flask
Wide Mouth Erlenmeyer Flasks ideal for titrations and culture work.
Corning™ PYREX™ Distilling Flasks
Round bottoms, vial mouths, with side arms at 75° angle
Eisco™ Glass Kjedahl Flasks, Plain Neck
Kjedahl flasks made from high quality borosilicate glass. Designed with a round bottom and plain long neck. Used for nitrogen determination as per the Kjedahl mthod. Conforms to DIN ISO 12360 standard
Eisco™ Class B Volumetric Flask
Eisco™ Class B Volumetric Flask without stopper is constructed of high quality Borosilicate 3.3 Glass and features a single graduation mark.
DWK Life Sciences Kimble™ ValueWare™ Flat-Bottom Florence Boiling Flasks
Low coefficient of expansion to resist thermal shock.
Eisco™ Class A Volumetric Flasks with Individual Work Certificates, USP
Class A Volumetric Flasks are USP-certified, and include interchangeable polypropylene stoppers and individual work certificates.
Eisco™ Gas Tube Graduated- Borosilicate Glass, cap. 50x0.2ml
This borosilicate glass gas tube is sealed at one end, designed for the collection and measurement of gases. 50mL capacity, 0.2mL graduations.
Eisco™ Glass Pear Shaped Boiling Flasks, Short Neck
Pear shaped boiling flasks made from high quality borosilicate glass. Designed with a short neck and interchangable joint as per DIN12383 standard.
Eisco Labs Sterile PETG Erlenmeyer Flasks with Flat Bottom
Sterile PETG Erlenmeyer flasks with non-vented caps are ideal for mixing, media prep, and storage featuring a stable flat bottom, durable construction, and compliance with lab safety and sterilization standards.
Eisco Labs Sterile PETG Erlenmeyer Flasks with Baffled Bottom
Sterile PETG Erlenmeyer flasks with non-vented caps and baffled bottoms offer secure storage and optimal mixing - perfect for cell culture, fermentation, and media prep in research or industrial lab environments.
Eisco™ Glass Three Neck Distillation Flasks
Eisco™ Glass Three Neck Distillation Flasks with screw threads at the neck, which allows the flasks to connect firmly with other glassware.