Borosilicate Glass Volumetric Flask, 20 ml, Class A, Pack of 10, Autoclavable

CH0449B01
Borosilicate Glass Volumetric Flask, 20 ml, Class A, Pack of 10, Autoclavable

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  • 20 ml borosilicate volumetric flask
  • Class A
  • Tolerance ±0.040 ml
  • Made from high quality 3.3 borosilicate glass
  • Pack of 10
  • Low temperature gradient - can withstand high temperatures and thermal shocks*
  • Superior chemical durability*
  • Autoclavable at 121°C
  • Complies with ASTM-1042
*See specifications tab for temperature and chemical durability information
    Material 3.3 Borosilicate Glass
    Class Class A
    Capacity 20 ml
    Stopper No
    Tolerance ±0.040 ml
    Graduation yes
    Thermal Properties (Flask)
    Coefficient of Linear Expansion 32.5 x 107 / °C
    Strain Point -515°C
    Annealing Point 565°C
    Softening Point 820°C
    Specific Heat 0.2
    Thermal Conductivity (Cal/cm3°C/Sec) 0.0027
    Chemical Durability
    Contact Chemical (mg/m2) Duration (hours) Loss in weight
    Water distilled at 100°C 6 10
    Water vapour steam at 121°C 1 75
    Acid HCl 6 100
    80% H2SO4 at 130°C 12 140
    Alkali -1N solution of Na2CO3 boiling 6 400
    Isotonic infusion Fluids
    NaCl (0.85%) at 121°C 2.5 70
    Glucose (5%) at 121°C 2.5 50