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
Chemglass Life Sciences 50 +/- 0.08mL Capacity, #13 Stopper Size, Orange Stopper Handle Color, Approx 148mm Height with Stopper
Volumetric Flask, 50 +/- 0.08mL Capacity, #13 Stopper Size, Orange Stopper Handle Color, Approx 148mm Height with Stopper. Low actinic red stained glass provides protection to light sensitive solutions. Allowing less than 1% transmission below 400nm and 5% from 400-600nm. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a CG-3020-A PTFE stopper.PLEASE NOTE: VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1,000mL, and 2,000mL ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS. HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES.
Chemglass Life Sciences 1000 +/- 0.30mL Capacity, #22 Stopper Size, Yellow Stopper Handle Color, Approx 350mm Height with Stopper
Volumetric Flask, 1000 +/- 0.30mL Capacity, #22 Stopper Size, Yellow Stopper Handle Color, Approx 350mm Height with Stopper. Low actinic red stained glass provides protection to light sensitive solutions. Allowing less than 1% transmission below 400nm and 5% from 400-600nm. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a CG-3020-A PTFE stopper.PLEASE NOTE: VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1,000mL, and 2,000mL ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS. HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES.
Chemglass Life Sciences 10 +/- 0.08mL Capacity, #13 Stopper Size, Approx 101mm Height with Stopper
Volumetric Flask, 10 +/- 0.08mL Capacity, #13 Stopper Size, Approx 101mm Height with Stopper. Low actinic red stained glass provides protection to light sensitive solutions. Allowing less than 1% transmission below 400nm and 5% from 400-600nm. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a glass stopper.
Chemglass Life Sciences 25 +/- 0.08mL Capacity, #13 Stopper Size, Approx 131mm Height with Stopper
Volumetric Flask, 25 +/- 0.08mL Capacity, #13 Stopper Size, Approx 131mm Height with Stopper. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a CG-3018 glass stopper.PLEASE NOTE: VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1,000mL, and 2,000mL ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS. HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES.
Chemglass Life Sciences 25mL Volumetric Flask, Class A, #9 Outer Stopper Neck, PE Stopper
25mL Volumetric Flask, Class A, #9 Outer Stopper Neck, PE Stopper. Flasks are manufactured to conform to Federal Specifications NNN-F-289 for Type 1, Class “A” unserialized flasks and ASTM E-288. Supplied complete with one closed bottom polyethylene stopper. For additional stoppers, see CG-8740.
Chemglass Life Sciences 5 +/- 0.08mL Capacity, #13 Stopper Size, Approx 96mm Height with Stopper
Volumetric Flask, 5 +/- 0.08mL Capacity, #13 Stopper Size, Approx 96mm Height with Stopper. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a CG-3018 glass stopper.PLEASE NOTE: VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1,000mL, and 2,000mL ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS. HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES.
Chemglass Life Sciences 250 +/- 0.20mL Capacity, #19 Stopper Size, Approx 250mm Height with Stopper
Volumetric Flask, 250 +/- 0.20mL Capacity, #19 Stopper Size, Approx 250mm Height with Stopper. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a CG-3018 glass stopper.PLEASE NOTE: VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1,000mL, and 2,000mL ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS. HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES.
Chemglass Life Sciences 250 +/- 0.20mL Capacity, #19 Stopper Size, Green Stopper Handle Color, Approx 250mm Height with Stopper
Volumetric Flask, 250 +/- 0.20mL Capacity, #19 Stopper Size, Green Stopper Handle Color, Approx 250mm Height with Stopper. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a CG-3020-A PTFE stopper.PLEASE NOTE: VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1,000mL, and 2,000mL ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS. HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES.
Chemglass Life Sciences 50mL Volumetric Flask, Class A, #9 Outer Stopper Neck, Mixing Bulb
50mL Volumetric Flask, Class A, #9 Outer Stopper Neck, Mixing Bulb. Similar to CG-1600 but with the addition of a mixing bulb between the calibration line and the stopper. The mixing bulb contains approximately one tenth of the flask capacity and aids in the mixing or dissolving of the flask contents. Supplied complete with one solid glass pennyhead stopper. For additional stoppers, see CG-3018.
Chemglass Life Sciences 20 +/- 0.08mL Capacity, #13 Stopper Size, Approx 130mm Height with Stopper
Volumetric Flask, 20 +/- 0.08mL Capacity, #13 Stopper Size, Approx 130mm Height with Stopper. Low actinic red stained glass provides protection to light sensitive solutions. Allowing less than 1% transmission below 400nm and 5% from 400-600nm. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a CG-8740 Polyethylene stopper.PLEASE NOTE: VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1,000mL, and 2,000mL ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS. HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES.
Chemglass Life Sciences 50 +/- 0.08mL Capacity, #13 Stopper Size, Approx 150mm Height with Stopper
Volumetric Flask, 50 +/- 0.08mL Capacity, #13 Stopper Size, Approx 150mm Height with Stopper. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a CG-8740 Polyethylene stopper.PLEASE NOTE: VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1,000mL, and 2,000mL ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS. HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES.
Chemglass Life Sciences 50 +/- 0.08mL Capacity, #13 Stopper Size, Approx 150mm Height with Stopper
Volumetric Flask, 50 +/- 0.08mL Capacity, #13 Stopper Size, Approx 150mm Height with Stopper. Low actinic red stained glass provides protection to light sensitive solutions. Allowing less than 1% transmission below 400nm and 5% from 400-600nm. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a CG-8740 Polyethylene stopper.PLEASE NOTE: VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1,000mL, and 2,000mL ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS. HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES.
Chemglass Life Sciences 200 +/- 0.12mL Capacity, #19 Stopper Size, Approx 200mm Height with Stopper
Volumetric Flask, 200 +/- 0.12mL Capacity, #19 Stopper Size, Approx 200mm Height with Stopper. Low actinic red stained glass provides protection to light sensitive solutions. Allowing less than 1% transmission below 400nm and 5% from 400-600nm. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a CG-8740 Polyethylene stopper.PLEASE NOTE: VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1,000mL, and 2,000mL ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS. HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES.
Chemglass Life Sciences 250mL Flask, Storage, 14/20 Outer Joint, Airfree, Schlenk
250mL Flask, Storage, 14/20 Outer Joint, Airfree, Schlenk. Round bottom storage flask with a standard taper outer joint on the sidearm. The 50, 100 and 250mL sizes have a 0-4mm Chem-Vac™ Chem-Cap valve while the 500 and 1000mL sizes have a 0-8mm valve size.