Whatman™ Qualitative Filter Papers: Grade 4 Sheets

Filters and retains course particles for monitoring air pollution. Whatman™ Qualitative Filter Papers: Grade 4 Sheets are used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

Brand: Whatman™

Manufacturer Part Number: 1004-917

UNSPSC: 41120000

Code: A0

Additional Details:
Additional Details: Weight: 2.31000kg

Product Code. 11342855

Quantity Price
1 £ 164.62 / Pack of 100
Estimated Shipment
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Description and Specification


Dimensions (L x W) 570 x 460mm
Width (Metric) 460mm
Length (Metric) 570mm
Flow Rate Fast
Particle Retention Coarse particles and gelatinous precipitates
Pore Size (Metric) 20 to 25μm
Thickness (Metric) 210μm
Quantity 100Pack
Format Sheet
Grade 4


These cellulose filters are used in qualitative analytical techniques to determine and identify materials and for clarifying liquids. 
  • Particle Retention: 25μm
  • Porosity: Coarse
  • Filtration speed: Herzberg, 37 sec.
  • Surface: smooth
  • Extremely fast filtering  with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide
  • Useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis