Volumetric Flask, Class B (Clear Glass)
A reliable laboratory essential designed for routine qualitative analysis, education, and general reagent preparation.
Dependable Volumetric Measurement for Daily Use
The Clear Volumetric Flask (Class B) offers a perfect balance of precision and cost-effectiveness for laboratories where the ultra-tight tolerances of Class A are not a primary requirement. Calibrated "To Contain" (TC, In) at the standard reference temperature of 20°C, these flasks are ideal for preparing non-critical standard solutions and general mixing tasks.
Manufactured by Yash Instrument Company using high-quality Borosilicate 3.3 Glass, these flasks feature the classic pear-shaped body and a narrow, graduated neck. This structural design ensures that the liquid meniscus is clearly visible, allowing for repeatable and reliable volume adjustments.
Economic Accuracy
Designed in accordance with ISO 1042 Class B standards. Provides a reliable accuracy profile suitable for educational chemistry and routine industrial testing.
Borosilicate 3.3 Glass
Offers superior resistance to chemical corrosion from acids and alkalis. The low-expansion glass ensures stability during autoclaving and thermal variations.
Leak-Proof Sealing
Equipped with a precision-ground interchangeable neck (NS joint), compatible with standard glass or PTFE stoppers for secure, splash-free mixing.
Key Technical Advantages
- Single Graduation Mark: Sharp, permanent enamel line fired into the glass for lifelong visibility and easy meniscus alignment.
- Uniform Wall Thickness: Robust construction minimizes the risk of breakage during handling and cleaning.
- Stress-Relieved Performance: Each flask is fully annealed in computer-controlled lehrs to eliminate internal glass tension.
- High Optical Clarity: Transparent, colorless glass ensures the user can monitor solution color and dissolution accurately.
- Interchangeable Design: Follows standardized joint sizing for compatibility with your existing laboratory inventory.


