250ml Volumetric Flask Class A

About 250ml Volumetric Flask Class A

A 250 mL volumetric flask is a type of laboratory glassware used to prepare precise liquid volumes for experiments, ensuring accuracy in solution concentrations. Heres an overview:

Key Features:

1. Material:

   • Borosilicate Glass: High thermal and chemical resistance, commonly used for most volumetric flasks.
   • Plastic (e.g., Polypropylene): Lightweight and shatter-resistant, suitable for some applications.

2. Volume:

   • Calibrated to contain exactly 250 mL at a specified temperature (usually 20C).

3. Design:

   • Pear-Shaped Body: Reduces evaporation and allows for easy mixing of solutions.
   • Narrow Neck: Increases accuracy during filling to the calibration mark.
   • Graduation Mark: Etched or printed on the neck for precise volume measurement.

4. Stopper:

   • Made of glass or plastic, it ensures the flask can be sealed for mixing and storage.