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
DWK Life Sciences KIMBLE™ RAY-SORB™ Amber Heavy Duty Wide Mouth Volumetric Flask, No Stopper
RAY-SORB processing protects flask contents from short-length lightwaves
Corning™ PYREX™ Serialized and Certified Class A Low Actinic Volumetric Flask with Glass Standard Taper Stopper
Featuring red low actinic stained glass to provide protection for materials sensitive to light. Corning™ PYREX™ Serialized and Certified Flasks, Low Actinic are tested and calibrated in an ISO/IEC 17025 certified laboratory.
Corning™ PYREX™ Class A Lifetime Red Volumetric Flask with Glass Standard Taper Stopper
Sharp, clear graduation lines
DWK Life Sciences Kimble™ KIMAX™ Brand Class A Volumetric Flasks
Calibrated To Contain and To Deliver
DWK Life Sciences Kimble™ KIMAX™ Volumetric Saybolt Viscosity Flask, Class A
KIMAX™ flask used in determining Saybolt viscosity of petroleum and bituminous materials.
BRANDTECH™ VITLAB™ Class B PMP Volumetric Flasks with NS Stoppers
An excellent alternative to glass flasks, these Class B PMP Volumetric Flasks with NS Stoppers are designed to tight tolerances in the laboratory.
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™ Polypropylene Volumetric Flask with Screw Cap
Flasks are constructed of high quality, durable polypropylene and fitted with a screw cap.
Eisco Labs Amber Volumetric Flask with Polyethylene Stopper and QR Code
Class A Amber Volumetric Flask is made from durable borosilicate glass, has a secure polyethylene stopper, and features a QR code for certification — ideal for precise lab work and safe handling of light-sensitive solutions.
Eisco™ Safety Pack Volumetric Flask Set - Class A, ASTM
Multi-piece Safety Pack Volumetric Flasks feature single white graduation line and glass penny stoppers.
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.
United Scientific™ Class A Volumetric Flask with Glass Stopper, Batch Certified (QR-Code)
Volumetric Flasks featuring a QR Code that makes tracking down certificates easier and simplifies the lab audit process.
United Scientific Supplies Class A Amber Volumetric Flasks Wide Mouth, Individually Certified, QR Coded
Amber Wide Mouth Volumetric Flasks are Class A Serialized and feature a QR Code for easy access to documentation.
United Scientific™ Class A Volumetric Flask with Snap Cap
Volumetric Flasks offering quality and value for the lab.