- UV protection due to external colouration
- All glass components
- Tight closure due to standard ground joint
A maximum usage temperature of +100 °C is recommended. Thermal shock resistance 30 K. Hydrolytic class 3. Note on using DURAN® glass stoppers with soda-lime glass bottles: If the bottle and the stopper have a temperature difference greater than 30 °C, the glass stoppers can become stuck! Classic narrow-neck, glass-stoppered reagent bottles in amber soda lime glass.