Pyrex Brand 5640 Class A Volumetric Flask; 1000 mL; 1/PK
- 1000 mL capacity, Class A
- Machine-blown glass body, strengthened
- Neck tooled for No. 13 Standard Taper glass stoppers
- Sharp, permanent graduation line
- Large white block letters inscription
Updated 2 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A Class A one liter volumetric flask for preparing standard solutions with a clear, easy to read inscription. The listing does not say a stopper is included, so check that before ordering.
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ASIN: B00NG2PC70Model: 5640-1LCategory: Volumetric Flasks
Overview
Preparing standard solutions to an exact volume is the job of this Pyrex volumetric flask, with a machine-blown body and heavy tubing neck. The neck is tooled to accept stoppers of a specific standard taper size.
Precise calibration and a bold inscription make reading and documenting easy, and the strengthened body resists everyday handling. The stopper is not described as part of the order, which is the main item to confirm.
Who it's for
Analytical labs and teaching benches that prepare standard solutions in full liter volumes. Small scale microchemical work is better served by a smaller flask.
Pros and cons
- Class A calibration
- Strengthened machine-blown body
- Sharp, permanent graduation
- Easy to read block lettering
- Stopper not described as included
- Dimensions not listed
- Glass breaks if dropped
Performance notes
The flask is calibrated to hold the labeled volume at the graduation line, and the strengthened neck handles stoppering and shaking. Accuracy depends on reading the meniscus level at the line and on a clean interior.
Specifications
| Brand | Pyrex |
|---|---|
| Model | 5640-1L |
| Dimensions & fit | |
| Neck Taper | No. 13 Standard Taper |
| Capacity & performance | |
| Capacity | 1000 ml |
| Construction & materials | |
| Material | Glass |
| Other details | |
| Shape | Cylinder |
| Bottom Shape | Round |
| Pack quantity | 1 per pack |
| Specification met | Class A |
Frequently asked questions
Is the Pyrex 5640 a Class A flask?
Yes. The title lists it as a Class A volumetric flask.
Is the graduation line on the Pyrex 5640 permanent?
The listing calls the graduation line sharp and permanent, with large white block letters for the inscription.