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 5mL Micro Volumetric Flask, Class A, Tolerance: +-0.02mL
5mL Micro Volumetric Flask, Class A, Tolerance: ¿0.02mL. Class ¿A¿ micro volumetric flask calibrated to contain. With 14/20 top outer joint and supplied complete with a CG-3000 14/20 hollow stopper. Flasks have hex base for stability and ¿V¿ shaped interior bottom for total sample retrieval.
Chemglass Life Sciences 10mL Micro Volumetric Flask, Class A, Tolerance: +-0.02mL
10mL Micro Volumetric Flask, Class A, Tolerance: ¿0.02mL. Class ¿A¿ micro volumetric flask calibrated to contain. With 14/20 top outer joint and supplied complete with a CG-3000 14/20 hollow stopper. Flasks have hex base for stability and ¿V¿ shaped interior bottom for total sample retrieval.
Sigma Aldrich Fine Chemicals Biosciences VOLUMETRIC FLASK 250ML 2/PK
NC3800032 VOLUMETRIC FLASK 250ML 2/PK
Ace Glass, Inc. Volumetric flask, class A, 2mL, blue lettering, with individual certificate, includes 7/16 polyethylene stopper, sp/2
Volumetric flask, class A, 2mL, blue lettering, with individual certificate, includes 7/16 polyethylene stopper, sp/2
Chemglass Life Sciences 100 +/- 0.10mL Capacity, #16 Stopper Size, Blue Stopper Handle Color, Approx 180mm Height with Stopper
Volumetric Flask, 100 +/- 0.10mL Capacity, #16 Stopper Size, Blue Stopper Handle Color, Approx 180mm 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 Flask, Volumetric, 25mL, PP, Class B, GL-18, Tolerance: +-0.08mL
Flask, Volumetric, 25mL, PP, Class B, GL-18, Tolerance: ¿0.08mL. Polypropylene(PP) volumetric flasks are manufactured to conform to Class ¿B¿ standards per DIN EN ISO 1042. The transparent polypropylene flasks are an excellent break-resistant alternative to glass. Flasks have a scored graduation line, with coloring added for visibility. Supplied complete with matching polypropylene screw cap.
Bellco Glass, Inc. Pre-mounted stainless steel clamps for bellco Erlenmeyer flask. Flask tray fits on top of the standard tray platform. Includes clamps. Flask positions: 16 Dimensions: 51x51cm Size: 250ml
Pre-mounted stainless steel clamps for bellco Erlenmeyer flask. Flask tray fits on top of the standard tray platform. Includes clamps. Flask positions: 16 Dimensions: 51x51cm Size: 250ml
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. 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, Approx 350mm Height with Stopper
Volumetric Flask, 1000 +/- 0.30mL Capacity, #22 Stopper Size, 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 glass stopper.
Chemglass Life Sciences 100mL Volumetric Flask, Class A, #13 Outer Stopper Neck, PE Stopper
100mL Volumetric Flask, Class A, #13 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 500mL Volumetric Flask, Class A, #19 Outer Stopper Neck, PE Stopper
500mL Volumetric Flask, Class A, #19 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 5mL Volumetric Flask, Class A, #9 Outer Stopper Neck, PE Stopper
5mL 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 50mL Volumetric Flask, Class A, #9 Outer Stopper Neck, PE Stopper
50mL 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.