250 ml Grade B Volumetric Flas Printer Combo

These premium Volumetric Flasks are crafted from durable borosilicate glass and come in a convenient pack of two, each with a 250mL capacity. Precision-made for laboratory and educational use, these flasks ensure reliable and highly accurate volume measurements. Designed with a chemical-resistant polyethylene stopper that fits securely (socket size 14/23), they comply with DIN 12664 standards. Perfect for tasks such as creating standard solutions or performing precise dilutions, these volumetric flasks are a staple for any science laboratory setup. The clear calibration marking ensures accurate liquid measurements at 20 °C, enhancing the reproducibility of experimental results.

The robust borosilicate material provides exceptional thermal and chemical durability, meaning these flasks can withstand autoclaving at 121 °C without compromising accuracy, making them ideal for frequent laboratory use. Thanks to low residual stress from careful annealing, they resist thermal shocks, enhancing their longevity.

Benefits for Educational Use:

• Facilitates teaching of precise volumetric techniques essential in chemistry.
• Enhances understanding of solution preparation and standardisation.
• Provides hands-on experience with calibrated scientific glassware.
• Supports lessons in thermal expansion and material properties.

Classroom Ideas:

• Use in practical demonstrations of molarity and dilution calculations.
• Ideal for titration setup practices.
• Incorporate into experiments requiring high measurement accuracy, such as preparing buffer solutions.
• Employ during lessons on laboratory safety and correct glassware handling.

Product Specifications:

• Capacity: 250mL
• Tolerance: ±0.30mL
• Socket Size: 14/23
• Stopper: Chemical-resistant polyethylene
• Pack Size: 2
• Material: Borosilicate Glass
• Temperature Tolerance: Autoclavable at 121 °C
• Thermal Properties:
• Coefficient of Linear Expansion: 32.5 x 10⁻⁷/ °C
• Strain Point: 515 °C
• Annealing Point: 565 °C
• Softening Point: 820 °C
• Specific Heat: 0.2
• Thermal Conductivity: 0.0027 Cal/cm ³ °C/sec
• Chemical Resistance: Resistant to water, acids, organic substances; not resistant to hydrofluoric acid or strong hot alkaline solutions.