The test tube with rubber cork, crafted from high-quality borosilicate glass and measuring 90 mm in height and 20 mm in diameter, is a durable and essential laboratory accessory designed to meet the demanding requirements of scientific research, education, and industrial testing. Known for its excellent thermal and chemical resistance, borosilicate glass ensures that this test tube can withstand high temperatures and exposure to a wide variety of chemicals without breaking, cracking, or reacting with the contents. Its structural integrity and clarity make it the ideal choice for accurate observation, heating, and storing of liquid or solid samples.
Description
This particular test tube comes with a precision-fit rubber cork, which adds a significant layer of utility and safety. The rubber cork ensures an airtight seal, preventing contamination, evaporation, and spillage of the sample contained within. This makes the test tube especially useful for experiments that involve volatile substances or require airtight environments for preservation or reaction control. The snug fit of the cork also allows the test tube to be inverted or shaken gently without the risk of leakage, thereby supporting a wider range of laboratory procedures, including storage, incubation, and chemical mixing.
With dimensions of 90 mm in height and 20 mm in diameter, the test tube provides ample volume for a variety of laboratory applications while remaining compact and easy to handle. Its size is ideal for both qualitative and quantitative experiments, whether for sample analysis, reagent preparation, or small-scale chemical reactions. The even wall thickness and rounded bottom ensure uniform heat distribution during flame heating or water bath applications, reducing the risk of thermal shock and breakage.
The borosilicate construction not only offers resistance to thermal expansion but also maintains excellent optical clarity, allowing for clear observation of changes in color, precipitation, or phase transitions during experiments. This makes it ideal for educational settings where students need to visually monitor reactions or for research labs where precision and visibility are key to reliable data collection.
The rubber cork further adds value by supporting safe storage solutions in laboratories. It is especially beneficial when storing reactive, sensitive, or odorous substances, as it effectively isolates the contents from external air and moisture. Made from chemically resistant, flexible rubber, the cork maintains its shape and sealing capability even after repeated use. It can also be easily removed and reapplied without compromising the test tube’s integrity, offering both convenience and durability.
In classroom settings, the test tube with rubber cork provides a hands-on learning tool for chemistry, biology, and general science experiments. Teachers can confidently demonstrate chemical reactions, solubility, or sample layering knowing that the tube is safe, durable, and easy for students to use. Its compatibility with standard lab racks, holders, and heating equipment further enhances its practicality in day-to-day laboratory operations.
In conclusion, the 90 mm x 20 mm borosilicate glass test tube with rubber cork is a highly functional and dependable piece of laboratory glassware. It combines chemical resistance, thermal stability, and airtight sealing in a compact form, making it an essential tool for professionals, educators, and students alike. Whether used for experimental analysis, sample storage, or teaching demonstrations, this test tube delivers exceptional performance and reliability across all laboratory environments.
