Corning Pyrex® #5640-2L
- 2000 mL capacity, Class A
- No. 27 Standard Taper glass stopper
- 6.22 x 6.22 x 14.06 inches
- ASTM E-694, E-542 and E-288 for tolerance and calibration
- Machine-blown body, heavy-tubing neck, round bottom
Updated 2 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A large two liter Class A volumetric flask with its glass stopper, for batch preparation of standard solutions. It is a big piece of glassware, so plan for storage and handling.
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ASIN: B0741FC16QModel: 5640-2L(single)Category: Volumetric Flasks
Overview
Not a small bench flask, this Pyrex volumetric flask holds two liters and comes with a standard taper glass stopper. The body is machine-blown, and the neck is made of heavy tubing.
A larger volume means fewer batches for big preparations, and the permanent graduation line and block lettering are easy to read. Weight and material are not listed in the specs.
Who it's for
Analytical labs that make large volumes of standard solutions. Small scale work is easier with a smaller flask.
Pros and cons
- Class A tolerance
- Strengthened machine-blown body
- Easy to read inscription
- Large size to store and handle
- Weight not listed
- Glass can break
Performance notes
The flask is calibrated so the meniscus at the graduation line marks the stated volume. The heavy tubing neck handles the stopper and shaking that a large volume needs.
Specifications
| Brand | Corning |
|---|---|
| Model | 5640-2L(single) |
| Capacity | 2000 ml |
| Neck Taper | No. 27 Standard Taper glass stopper |
| Bottom Shape | Round |
| Dimensions D x W x H | 6.22 x 6.22 x 14.06 inches |
| Specification met | Class A, ASTM E-694, E-542, E-288 |
Frequently asked questions
What is included with the Corning 5640-2L flask?
The title lists one flask with a Pyrex glass standard taper stopper. The description says the neck is tooled for No. 27 stoppers.
What standards is the 5640-2L made to?
It is made to Class A tolerances under ASTM E-694, E-542 and E-288.
How big is the Corning 5640-2L?
It measures 6.22 x 6.22 x 14.06 inches.