How chemically resistant is DURAN?
Glass, particularly DURAN borosilicate glass, has a greater resistance to chemical attack than any other known material. DURAN is highly resistant to water, acids, saline solutions, organic substances and also halogens such as chlorine and bromine. Its resistance to alkaline solutions is also relatively high. Details are as follows: Hydrolytic resistance to DIN-ISO 719 (98C): Hydrolytic resistance grain class ISO 719-HGB 1, which equates to hydrolytic resistance class 1 (1 is the most resistant class) Acid resistance: Acid class 1 (to DIN 12 116) i.e. acid attack mechanisms have no effect in practice, since the loss of wall thickness is virtually negligible. Alkali resistance: Alkali resistance class DIN 52 322-A2, i.e. for example when using 1mol/l NaOH (pH value approx.
