Corning Pyrex® #5640-200
- 200 mL capacity, Class A
- Pyrex glass standard taper stopper included, single flask
- 2.91 x 2.91 x 8.43 inches
- Round bottom, ASTM specification
Updated 2 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A single Class A volumetric flask with a matching ground glass stopper for preparing standard solutions at a mid size volume. The stopper taper size is not stated in the listing.
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ASIN: B0741F1RLYModel: 5640-200(single)Category: Volumetric Flasks
Overview
A chemist preparing a standard solution gets a Pyrex volumetric flask with a standard taper glass stopper in the same order. The flask has a round bottom and is listed to an ASTM specification.
Having the stopper supplied means the flask is ready for mixing by inversion once filled. The listing is brief, with no neck size, material line or weight beyond the dimensions.
Who it's for
Analytical and teaching benches making accurate solutions at this volume. Anyone who must match an existing stopper should verify taper size with Corning.
Pros and cons
- Class A calibrated
- ASTM specification listed
- Stopper taper size not listed
- Weight not listed
- Glass can break
Performance notes
The flask holds its labeled volume when the meniscus reaches the graduation line. Once the stopper is seated, inverting the flask mixes the solution evenly.
Specifications
| Brand | Corning |
|---|---|
| Model | 5640-200(single) |
| Capacity | 200 ml |
| Bottom Shape | Round |
| Stopper | Pyrex glass standard taper stopper |
| Dimensions D x W x H | 2.91 x 2.91 x 8.43 inches |
| Specification met | Class A, ASTM |
Frequently asked questions
How do I fit the stopper on the Corning 5640-200 flask?
The flask comes with a Pyrex glass standard taper stopper. The listing gives no fitting steps or taper size.
Is the 5640-200 sold as a set?
No. The title lists a single flask.
Is the Corning 5640-200 Class A?
Yes. The title lists it as a Class A volumetric flask.