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Class A Dark Volumetric Flask with Ground Glass Stopper (Type 2)
A Class A volumetric flask made of dark borosilicate glass, featuring a precisely ground conical stopper and a single calibration mark on the neck that indicates the nominal volume at 20 °C. This type ensures a tight yet smooth seal between the stopper and the neck, without the need for additional sealing materials.
Available volumes at Texnohim Plus warehouse
10 ml
25 ml
50 ml
100 ml
250 ml
500 ml
1000 ml
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Benefits of Dark Glass Volumetric Flasks
Light protection
Amber glass reliably blocks UV and visible light, preventing photochemical reactions in sensitive solutions.
Ground glass stopper
Ensures an airtight seal without additional sealing materials — ideal for safe storage and preventing evaporation.
Accuracy Class A
Complies with GOST 1770-74 and ISO Class A standards for precise volume measurements with minimal tolerance.
Applications of Dark Glass Volumetric Flasks
Preparation of light-sensitive solutions
Ideal for preparing solutions of iodine, hydrogen peroxide, chromate buffers, and other reagents prone to photodegradation.
Medical and biochemical research
Used for handling vitamins (A, D, E), hormone-based compounds, and unstable substances requiring protection from light and evaporation.
Analytical chemistry and spectrophotometry
Perfect for preparing calibration solutions and standards for UV/Vis analysis. The ground stopper eliminates air exposure.
Storage of volatile and unstable substances
Dark volumetric flasks offer reliable sealing and light isolation — crucial for long-term storage without concentration loss.
How to Order a Ground-Glass Stopper Volumetric Flask
Choose the required type and volume.
Submit a request via the form or call us directly.
Get a free consultation and confirm your order.
Fast delivery across Tashkent and all of Uzbekistan.
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