Volumetric Flasks
Volumetric flasks, also called graduated flasks or measuring flasks, are items of laboratory glassware or plasticware calibrated and labelled to contain a specified volume of reagents, solvents, or other liquids.
Volumetric flasks are often used to create chemical solutions. Many are manufactured and calibrated in ISO/IEC-certified laboratories and meet different ASTM and ISO standards of quality and dependability.
Volumetric flasks are typically pear shaped, with a flat base and long neck. They typically feature a single graduation ring etched or marked on the neck to define the specified fill level. They may also be supplied with a glass or plastic stopper.
Volumetric flasks come in capacities from 1 mL to 4 L and may be manufactured from either glass (borosilicate or soda lime) or autoclavable and chemical-resistant plastics such as polymethylpentene, polypropylene, or PFA. Glass versions may be clear, colored, or coated for handling light-sensitive liquids. Plastic flasks offer the advantage of being break-resistant and may also offer lower extractable profiles.
A Kohlrausch volumetric flask is modified to help transfer large amounts of solids into the flask for dissolution; it is commonly used to measure the sugar content of sugar beets. A Le Chatelier flask is designed for specific gravity determinations.
What Is the Difference Between Class A and B Volumetric Flasks?
Class A flasks are manufactured to high standards of precision for critical analytical work (often with a unique serial number for traceability), whereas Class B flasks offer less accuracy and are therefore more suitable for less demanding applications such as qualitative or educational use. Volumetric flasks are important items in a range of laboratory environments in both research and industry.
What Are Typical Applications of Volumetric Flasks?
• Preparation of standard solutions
• Preparation of series dilutions
• Filling, measuring, and decanting precise volumes of liquid
• Calibrating other containers and devices
Corning™ PYREX™ Class A Volumetric Flask with Glass Standard Taper Stopper
Improved lab convenience, broad selection and precise volume measurement as well as being manufactured to Class A tolerances
Corning™ Class A Reusable Volumetric Flasks
Autoclaved to 121°C.
Corning™ Class B Reusable Polypropylene Volumetric Flasks
Supplied with tapered polypropylene stopper with an individually calibrated graduation line.
Corning™ PYREX™ VISTA™ Class A Volumetric Flask
Necks are tooled for standard taper glass stoppers.
Kimble™ KIMAX™ Volumetric Flasks with Polyethylene Snap Caps
Borosilicate glass flasks supplied with snap caps.
Wilmad Labglass FLSK VOL CL A 50ML ST9 STPR
Volumetric Flask, Class A, To Contain, 50mL +/- 0.05mL capacity. Stopper Size: 9. Calibrated to contain at 20degreeC. Flask size complies with Federal Specifications NNN-F-289 for Type I, Class A (Unserialized flasks) and ASTM E-288.
Wilmad Labglass FLSK VOL CL A 1000ML PLS STPR
Volumetric Flask, Class A, To Contain, 1000mL +/- 0.30mL capacity. Stopper Size: 22.Calibrated to contain at 20degreeC.Flask size complies with Federal Specifications NNN-F-289 for Type I, Class A(Unserialized flasks) and ASTM E-288.
Wilmad Labglass FLSK VOL CL B 10ML ST9 STPR
Volumetric Flask, Class B, To Contain, 10mL +/- 0.04mL capacity. Stopper Size: 9. Calibrated to contain at 20degreeC. Flask size complies with ASTM E-288. Supplied with one solid glass Pennyhead Stopper.
Wilmad Labglass FLSK VOL CL A 25ML ST9 STPR
Volumetric Flask, Class A, To Contain, 25mL +/- 0.03mL capacity. Stopper Size: 9. Calibrated to contain at 20degreeC. Flask size complies with Federal Specifications NNN-F-289 for Type I, Class A (Unserialized flasks) and ASTM E-288.
Wilmad Labglass FLSK VOL CL A 250ML PLS STPR
Volumetric Flask, Class A, To Contain, 250mL +/- 0.12mL capacity. Stopper Size: 16.Calibrated to contain at 20degreeC.Flask is provided with plastic closed-bottom Stopper..
Wilmad Labglass FLSK VOL CL A 500ML PLS STPR
Volumetric Flask, Class A, To Contain, 500mL +/- 0.20mL capacity. Stopper Size: 19.Calibrated to contain at 20degreeC.Flask is provided with plastic closed-bottom Stopper..
Wilmad Labglass FLSK VOL CL B 100ML ST13 STPRR
Volumetric Flask, Class B, To Contain, 100mL +/- 0.16mL capacity. Stopper Size: 13. Calibrated to contain at 20degreeC. Flask size complies with ASTM E-288. Supplied with one solid glass Pennyhead Stopper.
Wilmad Labglass FLSK VOL CL A SRLZD 1000ML
Volumetric Flask, Class A, To Contain, 1000mL +/- 0.30mL capacity. Stopper Size: 22. Calibrated to contain at 20degreeC. Flask has serial number and is supplied with a Certificate of Compliance.
Wilmad Labglass FLSK VOL CL A SRLZD 2ML
Volumetric Flask, Class A, To Contain, 2mL +/- 0.015mL capacity. Stopper Size: 8. Calibrated to contain at 20degreeC. Flask has serial number and is supplied with a Certificate of Compliance.