Product Description
Vacuum filtration puts real stress on glassware, so the receiving flask needs extra strength. These graduated filter flasks use heavy-wall glass in an Erlenmeyer shape to withstand vacuum, and their graduations let users read filtrate volume at a glance without a separate transfer.
This listing is for Wheaton catalog number 635229: Filter Flask, Graduated, No. 5 Stopper Joint, 125mL. The side arm is a #2 hose connection that accepts standard 1/4 in ID flexible tubing to a vacuum source. The 125 mL size takes a No. 5 stopper and the 1000 and 2000 mL sizes take a No. 8 stopper. Glass is WHEATON 33 low extractable borosilicate meeting ASTM E438 Type I, Class A. A second trap flask between filter flask and vacuum source protects the pump. Add it to your LIGHT LABS order alongside the rest of your glassware and closures.
Key Features
- Heavy-wall glass – Provides the mechanical strength needed under vacuum.
- Graduated – Approximate volume markings show filtrate level.
- Hose side arm – #2 connection accepts 1/4 in ID tubing.
- Stopper joint sizes – No. 5 for 125 mL and No. 8 for 1000 and 2000 mL.
- Low extractable borosilicate – Meets ASTM E438 Type I, Class A.
Specifications
| Catalog Number | 635229 |
| Brand | Wheaton (DWK Life Sciences) |
| Description | Filter Flask, Graduated, No. 5 Stopper Joint, 125mL |
| Sold As | Each |
| Glass Type | WHEATON 33 low extractable borosilicate |
| Glass Standard | ASTM E438 Type I, Class A |
| Hose Connection | #2, 1/4 in (6 mm) ID tubing |
| Stopper Size | No. 5; No. 8 |
| Wall | Heavy wall |
Available Options
- 635232 – Filter Flask, Graduated, No. 8 Stopper Joint, 1000 mL
- 635233 – Filter Flask, Graduated, No. 8 Stopper Joint, 2000 mL
Applications
- Vacuum filtration
- Membrane filtration receiving
- Vacuum trap flask
- Buchner funnel filtration
