Whatman Grade 4 Qualitative Filter Papers - 20-25μm

Extremely fast filtering with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. Very useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis. Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
 Diameter  Part Number
 Price
 42.5 mm
 1004-042  $19.40 / Pack 100
 47 mm
 1004-047
 $21.61 / Pack 100
 55 mm  1004-055  $23.79 / Pack 100
 70 mm  1004-070  $23.79 / Pack 100
 90 mm  1004-090  $28.24 / Pack 100
 110 mm  1004-110  $36.14 / Pack 100
 125 mm  1004-125  $44.86 / Pack 100
 150 mm  1004-150  $55.89 / Pack 100
 185 mm  1004-185  $80.16 / Pack 100
 240 mm  1004-240  $134.18 / Pack 100
 320 mm  1004-320  $246.79 / Pack 100
 460 x 570 mm  1004-917  $466.32 / Pack 100

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