Material |
3.3 Borosilicate Glass |
Class |
Class A |
Capacity |
50 ml, 100 ml, 250 ml |
Graduation |
1.0 ml, 1.0 ml, 2.0 ml |
Tolerance |
±0.25 ml, ±0.50 ml, ±1.0 ml |
Guard |
Yes |
Thermal Properties |
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 |