Grade B Volumetric Flasks (Pack of 2)

Grade B borosilicate glass volumetric flasks for precise dilutions and preparing standard solutions.

Features

• Calibrated to contain the stated volume at 20°C when filled to the mark
• Chemical-resistant polyethylene stopper (DIN 12664)
• Dishwasher safe, and can be autoclaved at 121°C without affecting accuracy
• Highly resistant to water, neutral and acid solutions, concentrated acids, chlorine, bromine, iodine and organic matter
• Annealed under controlled conditions for minimal residual stress

Sizes

• 250mL: Tolerance ±0.30mL, socket size 14/23
• 1000mL: Tolerance ±0.80mL, socket size 24/29

Details

• Pack quantity: 2
• Material: Borosilicate glass
• Thermal properties: Linear expansion 32.5 x 10⁻⁷/°C; strain point 515°C; annealing point 565°C; softening point 820°C
• Chemical note: Hydrofluoric acid, very hot phosphoric acid and alkaline solutions attack the glass more as concentration and temperature rise

For accurate results, hold the flask vertical and read the meniscus at eye level to avoid parallax errors.

Safety: Do not expose to direct heat such as hotplates or Bunsen burners.