Overturning glass test tube 37×45-120-150-180 hydroponic test tube round bottom flat flower arrangement tube

Basic use
(1) Take liquid or solid reagents.
(2) Heat a small amount of solid or liquid.
(3) Prepare a small amount of gas reactor.
(4) Collect a small amount of gas.
(5) Dissolve a small amount of gas, liquid or solid solute.
(6) centrifugal as a container.
(7) Used as a reaction container for a small amount of reagents, used at room temperature or heating

Matters needing attention
(1) When filling the solution, it does not exceed 1/2 of the tube capacity, and when heating, it does not exceed 1/3 of the tube capacity.
(2) When adding liquid to the test tube with the dropper, it should be suspended and added, and should not be extended into the tube mouth.
(3) To take the block solid with tweezers to pick up to the mouth of the test tube, and then slowly erect the test tube to make the solid slide into the bottom of the test tube, can not make the solid fall directly, to prevent the bottom of the test tube from breaking.
(4) Use tube clips for heating, and the tube mouth should not face people. When heating the test tube containing solids, the mouth of the tube is slightly downward, and the tilt is about 45° when heating the liquid.
(5) The heat should be uniform, so as not to burst or burst the test tube.
(6) Can not be cooled after heating to prevent rupture.
(7) When heating, preheat to prevent the tube from sudden heat and burst.
(8) When heating, there should be no water on the outer wall of the test tube to prevent the test tube from bursting when suddenly cold.
(9) After heating, do not wash the test tube before it is cooled to room temperature.
(10) When using the test tube clamp to take the test tube, the test tube clamp from the bottom of the test tube to the upper part of the test tube, if the length of the test tube is divided into three equal parts, the test tube clamp on the end of the tube mouth within one third of the part is reasonable.
(11) Heating application of external flame.