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™ Glass Kjedahl Flasks with Socket
Kjedahl flasks made from high quality borosilicate glass. Designed with a round bottom, long neck, and socket. Used for nitrogen determination as per the Kjedahl mthod. Conforms to DIN ISO 12360 standard
Eisco™ Glass Buchner Filtering Flasks
High Quality borosilicate 3.3 glass Buchner filtering flasks available in a variety of socket sizes
Eisco™ Class B Glass Volumetric Flasks with Polypropylene Stopper
Eisco™ Class B Glass Volumetric Flasks with Polypropylene Stopper feature one graduation mark, a fitted chemical resistant stopper, and blue printed markings.
Eisco™ Class A ASTM Glass Volumetric Flask with Polypropylene Stopper
Made of high quality Borosilicate 3.3 glass in compliance with ASTM-E288 standards. With chemically resistant polypropylene stopper.
Eisco™ Class A Amber Volumetric Flasks with Individual Work Certificates
Class A Volumetric Flasks include interchangeable polypropylene stoppers and individual work certificates. Amber glass helps to protect light sensitive contents.
United Scientific™ Borosilicate Glass Round Bottom Boiling Flask
Boiling Flask featuring a high level of shock resistance.
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™ 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.
Eisco™ Glass Round Bottom Flask
Glass round bottom flask with screw thread neck in standard socket size. Made with high quality borosilicate 3.3 glass, extremely durable, with a low temperature gradient and superior chemical resistance. Connects firmly to other glassware with the help of threaded joints.
Eisco™ Class A Clear Volumetric Flasks with Individual Work Certificates
Class A Volumetric Flasks include interchangeable polypropylene stoppers and individual work certificates.
Eisco™ Class A Volumetric Flasks - ASTM
Class A Volumetric Flasks are manufactured according to ASTM standards, and include interchangeable polypropylene stoppers.
Eisco™ Glass Flat Bottom Flask
Glass flat bottom flask with screw thread neck in standard socket size. Made with high quality borosilicate 3.3 glass, extremely durable, with a low temperature gradient and superior chemical resistance. Flask connects firmly to other glassware with the help of threaded joints.
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.
United Scientific™ Borosilicate Glass Distilling Flask
Distilling Flasks ideal for distillation applications.