Volumetric Flasks
DWK Life Sciences Kimble™ KIMAX™ Heavy-Duty RAY-SORB™ Volumetric Class A Flasks without Stoppers 
RAY-SORB processing protects flask contents from short-length lightwaves
Corning™ Class A Reusable PMP Volumetric Flasks with Tapered PP Stopper
Autoclaved to 121°C
PYREX™ Class A Volumetric Flasks with Glass Standard Taper Stopper
Machine-blown body
DWK Life Sciences Kimble™ KIMAX™ Heavy-Duty Clear Glass Volumetric Class A Flasks without Stoppers
Stoppers are available separately
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
Fisherbrand™ PFA Flasks with Screw Caps
Calibrated “To Contain” within Class A tolerances.
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™ Heavy-Duty Clear Glass Volumetric Class A Flasks with PTFE Stoppers
Stoppers are color coded for easy identification
Thermo Scientific™ Nalgene™ Class B Polymethypentene (PMP) Volumetric Flasks with Screw Caps
Protect against leakage, breakage, and contamination with these volumetric flasks, calibrated “To Contain” and “To Deliver” at 20°C.
Fisherbrand™ Reusable Glass Class A Volumetric Flasks with Standard Taper Stopper
Single graduation ring blasted on the neck
DWK Life Sciences Kimble™ KIMAX™ Flasks for Light-Sensitive Materials
Calibrated “To Contain”
DWK Life Sciences Kimble™ Kontes™ Wide Mouth Class A Volumetric Flasks
Specially designed wide mouth mixing bulb for easy access of content in the flask
BrandTech™ Class A PMP Volumetric Flasks with NS Stoppers
These Class A Volumetric Flasks with NS Stoppers, calibrated “to contain”, are an excellent break-resistant alternative to glass in the laboratory.
BrandTech™ Class A Volumetric PFA Flasks with Screw Caps
VITLAB PFA volumetric flasks are individually calibrated, and certified Class A to DIN EN ISO 1042.
Corning™ Class B Reusable Polypropylene Volumetric Flasks with Tapered PP Stopper
Supplied with tapered polypropylene stopper with an individually calibrated graduation line
PYREX™ EZ Access™ Class A Heavy-Duty Wide Mouth Volumetric Flask with Glass Standard Taper Stopper
Interchangeable standard taper ground glass stoppers in various sizes
DWK Life Sciences Kimble™ KIMAX™ Flasks with standard taper Polyethylene Stoppers
Calibrated “To Contain”
BrandTech™ Class B Polypropylene Volumetric Flasks with Screw Caps
An excellent alternative to glass flasks, these Class B Polypropylene Volumetric Flasks with Screw Caps are designed to tight tolerances in the laboratory.
DWK Life Sciences Kimble™ KIMAX™ Heavy-Duty RAY-SORB™ Glass Class A Volumetric Flasks with Glass Stoppers
Protects contents from harmful UV light
DWK Life Sciences Kimble™ KIMAX™ Wide-Mouth Volumetric Flask
Calibrated “To Contain”
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 Pennyhead Stoppers
Calibrated “To Contain”
DWK Life Sciences Kimble™ KIMAX™ Heavy-Duty RAY-SORB™ Glass Volumetric Class A Flasks with PTFE Stoppers
Stoppers are color coded for easy identification
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
PYREX™ Class A Volumetric Flasks with PTFE Stoppers
Volumetric flask; long neck with flat bottom
PYREX™ Class A Volumetric Flasks with Glass Standard Taper Stopper
With glass pennyhead stopper
PYREX™ VISTA™ Class A Volumetric Flasks with Glass Standard Taper Stopper
Necks are tooled for standard taper glass stoppers
PYREX™ Certified/Serialized Class A Micro Volumetric Flasks, Standard Taper Joint
Long neck, flat bottom flask; with stopper.
Volumetric flasks are vessels calibrated to contain and measure a precise amount of liquid at a certain temperature. They have a volume marking, may have a closure, and can be used to prepare dilutions and standards. Typically they are pear-shaped with a flat bottom and made of glass or plastic.
The flasks’ elongated and narrow necks have a single etched ring graduation mark that indicates the volume contained when the flask is filled to that point. This means the flask is calibrated "to contain." The flask markings also indicate the nominal volume, tolerance, precision class, manufacturing standard, and the manufacturer's logo.
Sizes for volumetric flasks range from 1mL to 20L. Smaller or micro flasks may have a large base for greater stability. A volumetric flask may have a plastic snap or screw cap or a ground glass joint to accommodate a glass stopper.
Two classes of volumetric flasks are available.
- The higher standard is Class A, Class 1, USP or equivalent; these are more accurate and have a unique serial number for traceability
- A lower standard is Class B or equivalent, which is suitable for qualitative or educational use
Volumetric flasks are generally clear or colorless but may be colored or coated for handling light-sensitive compounds.
The 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.
The Le Chatelier flask is designed for specific gravity determinations.