Class A Batch Certified Volumetric Flasks with Glass Stopper
Manufacturer: United Scientific
United Scientific Class A Volumetric Flasks are the gold standard for laboratories requiring the highest levels of accuracy in solution preparation. Each flask is "Calibrated to Contain" (TC) at 20°C, meeting the rigorous dimensional and accuracy requirements of ASTM E-288 standards. These flasks are Batch Certified, ensuring that every unit within a production lot has been tested for compliance with Class A tolerances. Constructed from high-quality borosilicate glass, they offer excellent chemical resistance and thermal stability. The included ground glass stopper provides a leak-proof seal, making these flasks ideal for long-term storage of standard solutions and vigorous mixing of reagents.
Description
Key Functional Benefits:
- Traceable Reliability: Batch certification provides the necessary documentation for labs operating under ISO or GLP/GMP quality management systems.
- Superior Chemical Resistance: Borosilicate glass is highly resistant to water, neutral and acid solutions, concentrated acids, and organic substances.
- Leak-Proof Mixing: The precision-ground glass joint ensures a secure fit, allowing for inverted mixing to achieve perfect solution homogeneity.
- Permanent Markings: High-contrast white enamel graduations and markings are baked on for permanent durability and easy reading against the meniscus.
Laboratory Best Practices:
- Avoid Heat Stress: Never dry volumetric glassware in an oven or over a flame. Excessive heat can cause the glass to expand and not return to its original volume, potentially throwing the flask out of Class A calibration.
- Reading the Meniscus: For clear liquids, always read the bottom of the curved liquid surface (the meniscus) at eye level, ensuring it is exactly tangent to the graduation line.
- Cleaning: Use a mild laboratory detergent and avoid abrasive brushes that can scratch the interior surface, as scratches can trap residue and affect volume displacement.
- Stopper Care: To prevent ground glass joints from "freezing" or sticking, ensure the joint is clean before insertion. For alkaline solutions, consider using a PTFE stopper instead of glass.
-
Read MoreDistillation is one of the most commonly used scientific processes in the world. With applications across multiple disciplines and industries, distillation takes several forms, including simple, fractional, and vacuum, with even more specific variations, depending on the desired outcomes and component parts.
United Scientific Class A Volumetric Flasks are the gold standard for laboratories requiring the highest levels of accuracy in solution preparation. Each flask is "Calibrated to Contain" (TC) at 20°C, meeting the rigorous dimensional and accuracy requirements of ASTM E-288 standards. These flasks are Batch Certified, ensuring that every unit within a production lot has been tested for compliance with Class A tolerances. Constructed from high-quality borosilicate glass, they offer excellent chemical resistance and thermal stability. The included ground glass stopper provides a leak-proof seal, making these flasks ideal for long-term storage of standard solutions and vigorous mixing of reagents.
Starting at $20.80
Request A Quote
![Volumetric Flasks Class A | Batch Certified | United Scientific]()
Select a product below and add it to your cart to request a quote.
