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™ Unistore™ Sterile Sealed Caps for Erlenmeyer Flasks
Sealed Caps for use with sterile vented erlenmeyer flasks.
Eisco™ Glass Round Bottom Boiling Flask, Narow Neck
Round bottom boiling flasks made from high quality borosilicate glass. Designed with a narrow neck and beaded rim as per DIN173 standard.
Eisco™ Volumetric Flask with Polypropylene Stopper
Eisco™ Volumetric Flask with Polypropylene Stopper are made of high quality borosilicate glass and include an acid resistant stopper.
Eisco™ Class B Glass Volumetric Flasks with Snap Cap
Eisco™ Class B Glass Volumetric Flasks with Snap Cap features a flat bottom design, single graduation, and blue print markings.
Eisco™ Class A Volumetric Flasks - ASTM
Class A Volumetric Flasks are manufactured according to ASTM standards, and include interchangeable polypropylene stoppers.
Eisco™ Class A Glass Volumetric Flask with Stopper
Class A Glass Volumetric Flask with Stopper - Features a flat bottom design, single graduation, and blue print markings.
Eisco™ Class A Amber Glass Volumetric Flasks with Polypropylene Stoppers
Eisco™ Class A Amber Glass Volumetric Flasks with Polypropylene Stoppers protect light sensitive chemicals and feature a single graduation mark.
Eisco™ Conical Filtering Flask with Integral Side Arm
The borosilicate glass conical filtering flask with integral side arm is ideal for storage, mixing, and transferring of various solutions. The flask is easy to use in any lab with its flat bottom, side arm, narrow neck, and beaded rim.
Eisco™ Glass Erlenmeyer Flasks, Narrow Neck
Graduated conical flasks made from high-quality borosilicate 3.3 glass.
Eisco™ Glass Erlenmeyer Flasks with PTFE Lined Screw Cap
Erlenmeyer flasks made from high quality borosilicate glass. Includes an acid resistant polypropylene screw cap that is lined with PTFE. Both flask and cap are autoclavable.
Eisco™ Safety Pack Premium Glassware Set
Safety Pack Premium Glassware Set includes 3 low form beakers, 3 Class-A graduated cylinders, and 3 Erlenmeyer flasks.
Eisco™ Glass Volumetric Flasks with Polypropylene Stopper, Class A
Glass volumetric flasks with polypropylene stopper. Made from high quality borosilicate glass, polypropylene stoppers are acid resistant. Flasks are class A certified and individually calibrated in an ISO 17025 compliant calibration laboratory. Both flask and stopper can be autoclaved.
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 Glass Volumetric Flasks with White Graduations
Eisco™ Class A Glass Volumetric Flasks with White Graduations feature a flat bottom design, interchangeable solid glass stoppers, and single graduation.