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Whatman™ Qualitative Filter Papers, Fluted, Grade 4V
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Ultra-Fast Filtration for Coarse Particles & High-Throughput Workflows
Specifications:
| Application | Filtration |
| Storage Temperature | Room Temperature |
| Product Type | Filter Papers |
| Product Brand | Whatman™, Cytiva |
| Product Grade | Analytical grade |
Whatman™ Grade 4V Qualitative Filter Paper is a pre-folded (fluted) version of Whatman Grade 4, specifically engineered for very fast filtration and high loading capacity. Manufactured by Cytiva, this filter paper is optimized for applications where speed is critical and fine particle retention is not required.
With a nominal particle retention of 20–25 µm and an exceptionally fast filtration speed (Herzberg ~37 s), Grade 4V is ideal for filtering coarse particles, gelatinous precipitates, and viscous samples, making it a preferred choice in high-throughput laboratory environments.
Key Features
- Very Fast Flow Rate – Minimizes filtration time for rapid sample processing
- Pre-Folded (Fluted) Design – Ready-to-use, increases effective filtration area
- Coarse Particle Retention (20–25 µm) – Ideal for non-critical fine filtration
- High Loading Capacity – Handles heavy particulate and viscous samples efficiently
- Optimized for Gravity Filtration – Compatible with standard conical funnels
- Reliable Whatman Quality – Consistent performance across applications
Applications
- Filtration of coarse and gelatinous precipitates
- Rapid clarification of biological fluids
- Filtration of organic extracts prior to analysis
- General laboratory filtration where speed is prioritized
- Environmental and industrial sample preparation
- Food and beverage sample clarification
- High-throughput workflows in routine laboratories
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Whatman Grade 4V Filter Paper |
| Type | Qualitative, fluted (pre-folded) |
| Particle Retention | 20–25 µm |
| Filtration Speed | Very fast (Herzberg ~37 s) |
| Material | Cellulose |
| Format | Fluted cone (ready-to-use) |
| Application | Coarse filtration and rapid sample processing |
Available Sizes & Ordering Information
| Catalog Number | Diameter | Pack Size |
|---|---|---|
| 1204-125 | 125 mm | 100/pack |
| 1204-150 | 150 mm | 100/pack |
| 1204-0185 | 185 mm | 100/pack |
| 1204-240 | 240 mm | 100/pack |
| 1204-270 | 270 mm | 100/pack |
| 1204-320 | 320 mm | 100/pack |
Whatman™ Grade 4V filter paper is designed for laboratories that prioritize speed and throughput over fine particle retention. Its fluted design significantly increases filtration surface area, resulting in rapid liquid flow and reduced clogging, even when working with high particulate loads or viscous samples.
Compared to Grades 1V and 2V, Grade 4V offers the fastest filtration performance, making it especially suitable for pre-filtration, bulk sample processing, and applications involving gelatinous or coarse materials.
- Diameter: Ø 125mm Ø 150mm Ø 185mm Ø 240mm Ø 270mm Ø 320mm