Usage and precautions of beaker

1. Common specifications include 50ml, 100ml, 250ml, etc., but do not use a beaker to measure the liquid. 2. It should be heated on the asbestos net to make it heated evenly; When heating, the outer wall of the beaker shall be free of water droplets. 3. When heating the liquid, do not exceed 2 / 3 of the beaker volume, generally 1 / 2 of the beaker volume is appropriate. 4. In the process of dissolution or dilution, do not touch the bottom or wall of the cup when stirring with a glass rod. 5. When heating corrosive drugs, a surface dish can be covered on the beaker mouth to avoid liquid splashing. Beaker is a common laboratory glassware, which is usually made of glass, plastic or heat-resistant glass. The beaker is cylindrical, and one side of the top is provided with a notch for pouring liquid. Some beakers are also marked with scales on the outer wall, which can roughly estimate the volume of liquid in the beaker.