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High-Quality Volumetric Flask with PP Stopper - Trusted China Suppliers & Factory Direct Price
Volumetric Flask with PP Stopper
✓ Thickened material
✓ Accurate measurement
✓ Can withstand acid and alkali
Transparent
Brown
Product Name:
Volumetric Flask with PP Stopper
Product Specifications:
5-2000ml
Product Material:
High borosilicate glass
Product Introduction:
A volumetric flask is a pear shaped flat bottomed container with a neck marked with a line indicating that at the specified temperature, when the liquid level is tangent to the line on the neck of the flask, the volume of the solution is exactly equal to the volume marked on the flask. The volumetric flask is marked with temperature, capacity, and scale lines. It is a precise instrument used to prepare a solution with an accurate concentration of a certain substance.
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✓ Thick glass material, excellent workmanship, long service life.
✓ The bottom of the bottle is round, wide, and placed steadily.
✓ Multiple specifications are available to meet the needs of different customers.
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Product Details Show
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Volumetric Flask with PP Stopper Specs
| Description | Picture | Capacity (ml) | Neck Outer Diameter (mm) | Bottom Diameter (mm) | Height (mm) | Weight (g) |
| Transparent |
|
5 | 12 | 22 | 87 | 12 |
| 10 | 13 | 29 | 99 | 18 | ||
| 20 | 14 | 36 | 121 | 24 | ||
| 25 | 14 | 38 | 121 | 24 | ||
| 50 | 16 | 47 | 150 | 40 | ||
| 100 | 18 | 60 | 185 | 62 | ||
| 200 | 20 | 77 | 218 | 127 | ||
| 250 | 18 | 82 | 235 | 102 | ||
| 500 | 22 | 101 | 279 | 150 | ||
| 1000 | 28 | 127 | 340 | 268 | ||
| 2000 | 33 | 155 | 410 | 522 | ||
| Brown |
|
5 | 12 | 23 | 89 | 13 |
| 10 | 12 | 29 | 102 | 16 | ||
| 20 | 14 | 36 | 121 | 23 | ||
| 25 | 14 | 39 | 122 | 24 | ||
| 50 | 16 | 47 | 150 | 39 | ||
| 100 | 18 | 61 | 179 | 62 | ||
| 200 | 18 | 75 | 233 | 101 | ||
| 250 | 19 | 81 | 236 | 98 | ||
| 500 | 23 | 101 | 285 | 160 | ||
| 1000 | 28 | 126 | 337 | 265 |
Precautions
To check the airtightness, invert the volumetric flask and observe for water leakage. Then rotate the cork 180 degrees to observe for water leakage.
(1) Solute cannot be dissolved in the volumetric flask, but should be transferred to the flask after being dissolved in a beaker.
(2) The total amount of solvent used to wash the beaker cannot exceed the marking on the volumetric flask. Once exceeded, it must be re prepared.
(3) The volumetric flask cannot be heated. If the solute releases heat during the dissolution process, it should be transferred after the solution has cooled down, because as the temperature rises, both the bottle and the liquid will expand, and the expansion coefficient will be different, resulting in inaccurate volume measurement.
(4) Volumetric flasks can only be used for preparing solutions and should not be stored for long periods of time, as the solution may corrode the bottle body, thereby affecting the accuracy of the volumetric flask.
(5) After using the volumetric flask, it should be washed clean in a timely manner, the cork should be added, and a piece of paper should be sandwiched between the cork and the bottle mouth to prevent the cork from sticking to the bottle mouth.
(6) A volumetric flask can only prepare a certain volume of solution, but generally retains 4 significant figures (such as 250.0ML). It cannot be estimated that the number after the decimal point will change just because the solution exceeds or does not reach the scale line, and can only be reconfigured. Therefore, when writing the volume of the solution, it must be XXX.0ML.
Frequently Asked Questions
QHow do you check the airtightness of a volumetric flask?
To check the airtightness, fill the flask with water, insert the PP stopper, and invert the volumetric flask to observe for water leakage. Then, rotate the cork 180 degrees and invert it again to check for leakage.
QCan I dissolve solutes directly inside the volumetric flask?
No, solutes cannot be dissolved directly in the volumetric flask. The substance must first be dissolved in a beaker and then transferred into the volumetric flask.
QWhy can't the volumetric flask be heated during the dissolution process?
Volumetric flasks cannot be heated because temperature rises cause both the glass bottle and the liquid to expand at different rates. If a solute releases heat during dissolution, it must be cooled down before transferring it to the flask to prevent inaccurate volume measurements.
QCan a volumetric flask be used for long-term solution storage?
No. Volumetric flasks are precise instruments designed only for preparing solutions. They should not be used for long-term storage as the chemical solution may corrode the glass body and affect future measurement accuracy.
QWhat is the correct way to store a volumetric flask after use?
After use, clean the volumetric flask immediately. When inserting the PP stopper for storage, place a piece of paper between the cork and the bottle mouth to prevent the stopper from sticking.
QHow accurate is the volume measurement of a volumetric flask?
A volumetric flask is designed to prepare a specific volume of solution, generally retaining 4 significant figures (e.g., 250.0ML). If the liquid level goes above or falls below the scale line, the solution cannot be estimated and must be re-prepared.