2. When heating the liquid, the volume of the liquid does not exceed 1/3 of the volume of the test tube. When heating, the test tube is placed at an angle of 45° to the table top. When heating, the test tube is preheated, and then the middle and lower parts of the liquid in the test tube are heated, and from time to time. Move the test tube up and down. In order to avoid injury, do not point the test tube to yourself or others while heating.
Contact: Marco
Phone: +8618810549043
Whatsapp: +8618810549043
Email: info@bqchemicals.com
Add: Room 303, Unit 3, Building 1, Community Luozhuangxili, Haidian District, Beijing, China.