Your Cart (0)
Thumbnail Filmstrip of Qualitative Filter Paper, Grade 4, 185mm, 20um Retention, Cellulose, Nonsterile, 100/Pk Images
Featuring a cellulose depth medium engineered for extra-fast filtration, this Grade 4 qualitative filter paper delivers high flow rates while capturing coarse particles and gelatinous precipitates. Supplied as 185mm hydrophilic circles with a nominal 20um particle retention, each filter handles heavily loaded samples where the collection of fine particles is not critical. The qualitative grade is well suited to routine laboratory separations, clarification, and general filtration tasks.
Key Cellulose Filter Paper Characteristics
- Naturally hydrophilic cellulose medium that wets quickly for fast sample throughput
- Nominal 20um particle retention captures coarse particles and gelatinous precipitates such as iron hydroxide and aluminum hydroxide
- Extra-fast flow rate ideal for samples that are difficult to clarify or heavily loaded
- Qualitative grade suited to general-purpose separations where fine-particle collection is not required
- Depth structure provides high loading capacity for routine filtration
Key Construction Characteristics
- 185mm diameter circles for use in funnels and Buchner setups
- Cellulose construction for broad routine laboratory compatibility
- Nonsterile
- Supplied 100 filters per pack
This filter paper provides consistent, repeatable flow and retention across routine workflows, protecting downstream steps from coarse particulate. Its high loading capacity maintains throughput on difficult-to-clarify samples, while the qualitative cellulose medium supports dependable separation and sample integrity.
- Diameter
- 185mm
- Flow Speed
- Extra Fast
- Grade
- Qualitative, Grade 4
- Material
- Cellulose
- Mesh Format
- Circle
- Pack Count
- 100
- Particle Retention
- 20um
- Pore Size (µm)
- 20
- Qualitative/ Quantitative
- Qualitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 4
- Routine Sample Clarification Rapidly clarifies turbid liquids and biological fluids where fast flow is needed and fine-particle collection is not critical.
- Coarse Precipitate Filtration Captures coarse and gelatinous precipitates such as iron hydroxide, aluminum hydroxide, and chromium hydroxide.
- Organic Extract Cleanup Provides routine clean-up of organic extracts during analytical sample preparation.
- Food Analysis Supports general food industry filtration tasks requiring high flow and high loading capacity.
- Air Pollution Monitoring Suited to monitoring air pollution where the collection of fine particles is not required.
- Buchner Funnel Filtration The 185mm circle format performs well in funnel and Buchner setups handling heavily loaded samples.