Laboratory chemical glass test tubes are usually made of high borosilicate glass or hard glass. These materials have excellent chemical stability, thermal stability, and optical transparency, and can withstand high temperature, high pressure, and strong corrosive chemical substances. High borosilicate glass is highly favored due to its low thermal expansion coefficient, which enables it to maintain structural stability under extreme temperature conditions.

Type

Ordinary test tube: usually has a straight wall and a round bottom, used for general chemical reactions and heating experiments.

Cone shaped test tube: The bottom is narrow and the top is wide, making it easy to mix and observe reactions.

Centrifugal test tube: designed with a screw cap, used for sample separation in centrifugal experiments.

Scale test tube: equipped with precise scales, used for solution preparation and measurement.

Purpose

Chemical reaction vessel: A test tube is the basic container for chemical reactions, which can hold reactants and products and observe the reaction process.

Heating experiment: The test tube can be directly heated on a flame for experiments such as heating, melting, evaporation, and distillation of substances.

Solution preparation: The use of graduated test tubes can accurately prepare and dilute solutions.

Material separation: Centrifugal test tubes can be used to separate samples in centrifugal separation experiments.