Duran narrow-neck bottle 250 ml, brown, NS 19/26, stopper, pack of 10

DURAN® storage bottle, narrow neck, brown, NS 19/26, with glass stopper, 250 ml The classic reagent bottles that can be closed with a stopper are made of DURAN® borosilicate 3.3 Type 1 glass and are suitable for storing liquid and solid chemicals as well as reagents. The bottles have a narrow, conical ground joint and comply with ISO 4796-2. The narrow neck is suitable for liquids, and the angle of the bottle shoulders ensures that the contents can be poured out easily. The glass stopper provides excellent sealing, protecting the contents from evaporation, oxidation and contamination. The labelling field and the Retrace Code for traceability of production are printed in durable white enamel. The brown colouring protects light-sensitive materials from the effects of photodegradation. Protection against ultraviolet light complies with the international USP/EP standards and lasts throughout the entire service life of the bottle. Special features and benefits: UV protection up to approx. 500 nm wavelength through external colouring The purely external brown colouring ensures unchanged DURAN® properties inside the bottle Long service life and good chemical resistance of the brown colouring Consists only of glass components and is therefore suitable for storing aggressive materials Tight closure through standard ground joint Easily readable scale with graduation marks for measuring the contents Fired-in and therefore permanently durable white printed image Application: Storage of light-sensitive reagents, pharmaceuticals and chemicals, storage of light-sensitive samples, storage of light-sensitive reagents, pharmaceuticals and chemicals, storage of hygroscopic liquids and pharmaceuticals