Test tubes

Made from high quality borosilicate glass with a silica content of 80%, this glassware possesses marked mechanical strength and very high resistance against chemical attacks. Furthermore, its low linear coefficient of thermal expansion makes it capable of withstanding high levels of thermal shock.

SiO2 Content	> 80%	Linear Coefficient of Thermal Expansion	3.3 X 10-7K- 1
Strain Point	520 C	Acid Resistance	Grade 1
Softening Point	820 C	Alkali Resistance	Grade 2
Annealing Point	560 C	Thermal Shock Resistance	300 C