Designed for demanding vacuum filtration workflows, this filter flask features heavy-wall borosilicate glass construction with an integral barbed side arm for secure vacuum line connections. Manufactured to ASTM E1404 standards, each flask withstands the pressure differentials encountered during Buchner funnel filtration without compromising structural integrity. Dual graduated markings provide accurate volume measurement from both sides of the flask.
Filter Flask Features and Benefits
- Material: Heavy-wall borosilicate glass 3.3 — resists thermal shock and chemical attack
- Standard: ASTM E1404 — verified dimensional accuracy and glass quality
- Side Arm: Integral barbed tube for secure vacuum hose attachment without adapters
- Graduations: Dual white enamel markings for easy volume reading from any angle
- Sizes: Available in 25mL through 1000mL to suit micro-scale through standard workflows
Available Sizes and Pack Quantities
| SKU | Volume | Pack Size |
|---|---|---|
| 8450025 | 25mL | Box of 6 |
| 8450025 | 25mL | Case of 3 |
| 8450050 | 50mL | Box of 6 |
| 8450050 | 50mL | Case of 3 |
| 8450125 | 125mL | Box of 6 |
| 8450125 | 125mL | Case of 3 |
| 8450250 | 250mL | Box of 6 |
| 8450250 | 250mL | Case of 3 |
| 8450500 | 500mL | Box of 6 |
| 8450500 | 500mL | Case of 3 |
| 8451000 | 1000mL | Box of 6 |
| 8451000 | 1000mL | Case of 2 |
Laboratory Applications
- Vacuum filtration with Buchner funnels for precipitate collection and solvent removal
- Suction filtration of crystallized products in organic chemistry synthesis
- Environmental water sample filtration for suspended solids analysis
- Vacuum-assisted solvent degassing for HPLC mobile phase preparation
- Vacuum trapping in distillation and evaporation apparatus setups
Quality Assurance and Compliance
Globe Scientific filter flasks are manufactured from borosilicate glass 3.3 conforming to ASTM E1404 and ISO 3585 standards. Heavy-wall construction provides a safety margin for vacuum service, while the integral side arm eliminates potential leak points found in detachable designs. Each flask is annealed to relieve internal stress and inspected for optical clarity and dimensional accuracy before packaging.
Filter Flask Comparison: Why Choose Globe Scientific?
| Feature | Globe Scientific 845 Series | Typical Competitor |
|---|---|---|
| Glass Type | Borosilicate 3.3 | Borosilicate (grade varies) |
| Standard | ASTM E1404 | Often unlisted |
| Wall Thickness | Heavy wall for vacuum | Standard wall |
| Pricing | Below retail pricing | Full retail |
| Ships From | USA inventory | Varies |
| Authorized Dealer | Yes | Often third-party |
Volume Discounts and Institutional Pricing
LabSupplies.com offers tiered quantity pricing for academic and research institutions. As an authorized dealer, we ship directly from USA inventory.
Frequently Asked Questions
What is a filter flask used for in a laboratory?
A filter flask connects to a vacuum source through its side arm to accelerate liquid filtration. Paired with a Buchner funnel and filter paper, the vacuum draws filtrate through the membrane while retaining solids. Globe Scientific filter flasks feature heavy-wall borosilicate glass rated for full vacuum service.
Can borosilicate filter flasks be autoclaved?
Yes, borosilicate glass 3.3 withstands autoclave conditions at 121°C and 15 psi for standard sterilization cycles. Ensure gradual temperature transitions to prevent thermal shock. Globe Scientific 845 series flasks meet ASTM E1404 thermal resistance requirements for repeated autoclave use.
What sizes of filter flasks does LabSupplies.com carry?
LabSupplies.com stocks Globe Scientific filter flasks in six sizes: 25mL (8450025), 50mL (8450050), 125mL (8450125), 250mL (8450250), 500mL (8450500), and 1000mL (8451000). All sizes are available in box and case quantities at below retail pricing.