Physical Data
Coefficient of expansion 7.0
Annealing point 514℃
Softening point 695℃
Density 2.47g/cm-3
Chemical Resistance
Hydrolytic Class
(DIN ISO 719) HGB 2
to Ph. Eur. Type II
to USP Type II
Powdered glass (USP 661) 0.89ml
Water attack of glass (USP 661) <0.1ml
Arsenic <0.1μg/g
Chemical Composition
main components in approx weight %
Sio2 71
Al2O3 2
Na2o 16
K2O 2
CaO -
