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Whatman™ Grade 4 Qualitative Filter Paper

Provides a variety of filtration applications when fine particulate collection is not required. Whatman™ Grade 4 Qualitative Filter Paper can be used as a rapid filter for biological clean-up or during extraction of organic materials.

Manufacturer: whatman™  1004-125

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Catalog No. 09-825D


Description & Specifications


Quantity 100Pack
Diameter (Metric) 125mm
Grade 4
Material Cellulose
Thickness (Metric) 210μm
Pore Size (Metric) 20 to 25μm
Particle Retention Coarse particles and gelatinous precipitates
Flow Rate Fast
Format Circle

Used in air-pollution monitoring and routine cleanup of biological fluids

  • Retains coarse particles, gelatinous precipitates
  • Particle retention: >20–25μm
  • Porosity: Coarse
  • Filtration speed†: Herzberg, 37 sec.
  • Surface: Smooth


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