Kapoor Glass Flint Borosilicate Glass
Kapoor glass tubing has outstanding chemical resistance and
a low expansion coefficient.
It is particularly suitable for pharmaceutical containers
requiring characteristics which remain constant in time.
| Typical
Composition |
Physical
Properties |
| SiO2
...............72.0% |
Working
point ...........11500C |
| B2O3
................9.0% |
Softening
point ..........7650C |
| Al2O3
................5.1% |
Annealing
point ..........5500C |
| Na2O
................7.6% |
Strain
point ...............5200C |
| K2O
..................1.9% |
Coefficient
of expansion |
| CaO
..................1.1% |
(30-3000C)
.............57x10-7 |
| BaO
..................3.0% |
Density
.................2.43g/cc |
|
Hydrolytic Properties : (As per UP, EP & IP)
Typical value : 0.50 ml. of 0.02 NH2SO4
for 10g. of sample per 50 ml. of autoclaved solution (water)
Limit : 1.0 ml.
|
