Glass dropper with trimmed pipette

The dropper bottle made of white soda-lime glass (hydrolytic class III), according to ISO 9001 (24091), has a flat ground stopper. Glass of this class, called soft glass, has medium hydrolytic resistance and is not recommended for long-term storage of aqueous and especially aqueous-alkaline sample solutions (e.g., for repeated use). Regardless, cylinders of the above hydrolytic class find excellent use in the analytical field.