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, PTFE Stopper
Stoppers are color coded for easy identification
Corning™ PYREX™ EZ Access Heavy Duty Class A Wide Mouth Volumetric Flasks With GL32 Screw Cap
Thicker, heavy duty glass provides increased durability
DWK Life Sciences Kimble™ KIMAX™ Flasks Serialized and Certified with standard taper Pennyhead Stopper
Calibrated and certified against NIST-Traceable equipment
DWK Life Sciences Kimble™ KIMAX™ Class B Flasks with standard taper Pennyhead Stopper
Calibrated To Contain within Class B tolerances
Corning™ PYREX™ Class A Volumetric Flask with Screw Cap
Calibrated To Contain
BRANDTECH™ VITLAB™ PFA Volumetric Flasks with Screw Caps
VITLAB™ PFA volumetric flasks are individually calibrated, and certified Class A to DIN EN ISO 1042.
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.
Supertek™ Class B Polypropylene Volumetric Flasks with Stoppers
Light in weight, these Class B PP Volumetric Flasks are an excellent break-resistant alternative to glass and come with the newly designed super-stoppers.
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™ Safety Pack Volumetric Flask Set - Class A, ASTM
Multi-piece Safety Pack Volumetric Flasks feature single white graduation line and glass penny stoppers.
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.
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.