Physical Data
Coefficient of mean liner thermal
expansion α (20℃;300℃) 4.87x10-6εK-1
Annealing point 562℃
Softening point 786℃
Density 2.37g/cm-3
Chemical Resistance
Hydrolytic Class
(DIN ISO 719) HGB 1
to Ph. Eur. Type 1
to USP Type 1
Acid Class(DIN 12 116) Class S 1
Alkali Class (DIN ISO 695) Class A 2
Powdered glass (USP 661) 0.2ml
Water attack of glass (USP 661) <0.1ml
Arsenic <0.1μg/g
Chemical Composition
main components in approx weight %
Sio2 75
B2O3 10.51
Al2O3 5.27
Na2o 4.76
K2O 1.64
BaO 0.55
CaO 1.59
LiO2 0.27
Fe
2O
2 0.024
