08 TECHNICAL INFORMATION | PRODUCT SECTION
Alkali resistance DURAN® corresponds to Class 2 of the glasses divided into 3 alkali classes in accordance with DIN ISO 695. The surface erosion after 3 hours boiling in a mixture of equal volume fractions of sodium hydroxide solution (concentration 1 mol/l) and sodium carbonate solution (concentration 0.5 mol/l) is only 134 mg/100 cm 2 .
Alkali attack on DURAN® as a function of temperature (°C)
Overview of the chemical properties of technical glasses
Description
Chemical resistance class
Hydrolytic resistance DIN ISO 719
Acid resistance DIN 12 116
Alkali resistance ISO 695
DURAN® FIOLAX®
1 1 3 1
1 1 1 1
2 2 2 1
Soda-lime glass
SBW
194
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