250ml Borosilicate Glass Conical Separatory Funnel with Glass Stopcock & 19/26 Joints - Pear Shape Lab Equipment for Chemistry, Science Experiments & Educational Use

Material: 3.3 borosilicate glass Capacity: 250ml Height: 275MM Sphere diameter: 75MM Caliber: 19MM Uses: liquid separation, material separation and purification, solid liquid or liquid and liquid reaction generating device. use: 1. Solid-liquid or liquid-liquid reaction generating device: control the amount of liquid added and the reaction rate. 2. Separation and purification of substances: liquid separation of two liquids which are incompatible with each other after extraction. Use process: Leak detection, adding liquid, shaking, standing, dispensing, washing. Precautions: 1. If the extraction operation is carried out with a pear-shaped separatory funnel: when oscillating, the small groove of the piston should be closed and plugged tightly with the small hole on the side of the funnel. At the time of liquid separation, the lower liquid flows out from the funnel neck, and the upper liquid is poured out from the funnel opening. 2. After the separatory funnel is cleaned, take out the stopper and do not insert it into the separatory funnel, especially before entering the oven. When using the separatory funnel for a long time, a paper strip should be placed on the piston surface to prevent sticking. And use an elastic band to cover the piston to avoid loss.