- With joint & stopper
- With Graduation
| PART No. | Height x O.D.(mm) | Stopper Size | PACK Qty. |
| 7490-100 | 100 x 12 | 10/19 | 100 |
| 7490-125 | 125 x 16 | 12/21 | 100 |
| 7490-150 | 150 x 18 | 14/23 | 100 |
| 7490-150-A | 150 x 25 | 19/26 | 100 |
| 7490-200 | 200 x 25 | 19/26 | 100 |
| 7490-200-A | 200 x 12 | 24/29 | 50 |
| 7490-200-B | 200 x 38 | 24/29 | 50 |
Here are some common uses of test tubes with joints and stoppers:
- Reactions and Synthesis:
- Test tubes with joints and stoppers are used in chemical reactions and synthesis. The airtight seal provided by the stopper allows for controlled reactions and prevents the escape of gases or vapors.
- Distillation:
- These test tubes are suitable for simple distillation setups. The joint allows for the attachment of distillation apparatus such as condensers, and the stopper helps in maintaining a closed system during the distillation process.
- Sublimation:
- Test tubes with joints and stoppers can be used in sublimation experiments where a substance transitions directly from a solid to a gas. The joint can accommodate apparatus for sublimation setups.
- Vacuum Filtration:
- When performing vacuum filtration, test tubes with joints and stoppers are useful. The joint allows for the attachment of a filtration apparatus, and the stopper ensures a sealed environment during the filtration process.
- Gas Collection and Analysis:
- The joint allows for the attachment of gas collection apparatus, such as a gas syringe or a gas burette. This is useful for collecting and analyzing gases produced in chemical reactions.
- Heating Under Reflux:
- Test tubes with joints and stoppers are suitable for refluxing reactions where the reaction mixture is heated for an extended period under a reflux condenser. The joint facilitates the connection of the condenser.
- Spectroscopy and Colorimetry:
- These test tubes are used for preparing samples for spectroscopic or colorimetric analysis. The airtight seal provided by the stopper ensures that the sample does not evaporate or get contaminated before analysis.
- Crystallization:
- In crystallization experiments, where a substance is allowed to crystallize from a solution, test tubes with joints and stoppers can be used to maintain a controlled environment during the crystallization process.
- Storage of Sensitive Samples:
- Test tubes with joints and stoppers are suitable for storing sensitive or volatile samples, as the airtight seal helps prevent the escape of gases or the entry of contaminants.
- Extraction and Soxhlet Apparatus:
- These test tubes can be used in extraction procedures, and the joint allows for the attachment of a Soxhlet apparatus for continuous extraction.
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