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
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.
Fisherbrand™ Reusable Glass Class A Volumetric Flasks with Standard Taper Stopper
Single graduation ring blasted on the neck
Corning™ PYREX™ Class A Volumetric Flasks with Glass Standard Taper Stopper
Machine-blown body
DWK Life Sciences Kimble™ KIMAX™ Heavy-Duty Clear Glass Class A Volumetric Flasks with Glass Stoppers
Large numbers make it easy to identify volume from far away
DWK Life Sciences Kimble™ KIMAX™ Heavy-Duty Clear Glass Volumetric Class A Flasks without Stoppers
Stoppers are available separately
Corning™ PYREX™ VISTA™ Class A Volumetric Flasks with Glass Standard Taper Stopper
Necks are tooled for standard taper glass stoppers
Corning™ Class A Reusable PFA Volumetric Flasks with Screw Cap
Autoclaved to 121°C
DWK Life Sciences Kimble™ KIMAX™ Heavy-Duty Clear Glass Volumetric Class A Flasks with PE Stoppers
With polyethylene stoppers
DWK Life Sciences Kimble™ KIMAX™ Flasks with standard taper Polyethylene Stoppers
Calibrated To Contain
Corning™ PYREX™ Class A Lifetime Red Volumetric Flask with Polyethylene Snap-Cap
Graduated with fine lines etched through narrow red band for legibility, accuracy and permanence
Corning™ Class B Reusable Polypropylene Volumetric Flasks with Tapered PP Stopper
Supplied with tapered polypropylene stopper with an individually calibrated graduation line
Thermo Scientific™ Nalgene™ Class B Polypropylene Copolymer Volumetric Flasks with Closure
Lighter in weight than glass, these flasks are break-resistant, offer excellent chemical resistance and protect against leakage and contamination.
DWK Life Sciences Kimble™ KIMAX™ Plastic Safety-Coated Class A Volumetric Flasks with Glass Stopper
Heavy-duty, wide-mouth flasks
Corning™ PYREX™ Class A Volumetric Flask with Polyethylene Standard Taper Stopper
Sharp, clear graduation lines