USP-1 glass is neutral borosilicate glass with high content of boron having both high thermal and chemical resistance. Glass is meant for glass tube production and corresponds to technical specifications 00480945-002-96 "Neutral borosilicate medical glass".

Water resistance of neutral borosilicate medical glass corresponds to class 1 of HGA ISO 720.

Alkali resistance of neutral borosilicate medical glass corresponds to class 2 of National State Standard 19810.

These characteristics allow to use neutral borosilicate medical glass for medical packing production to ensure long and safe storing of medicines.


Chemical Composition of Neutral Borosilicate Medical Glass


ComponentsContents in the mass shares, %
SiO2 74.20
B2O3 8.50
Na2O 7.90
Al2O3 6.00
Sum CaO, MgO 2.60
K2O 0.50

Physical and Chemical Parameters of Neutral Borosilicate Medical Glass


Denomination Unit measure Value

Thermal resistance, not less

оС

170

Coefficient of linear thermal expansion in the range (20 - 300) оС

α х 10-6degree-1

5,5 - 6,5

Densiity

g/cm3

2,35-2,37

Water resistance, not more

mg Na2
by 1 g of glass

0,035

Alkaline resistance, not more

mg/dm2 120

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