Whatman® Grade 4 Qualitative Filter Paper

Whatman® Grade 4 filter paper is 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.

Whatman® Grade 4 filter paper has a particle retention of 25 μm at 98% efficiency.

Prepleated available as Grade 4V.

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WHA1204320 Whatman® Prepleated Qualitative Filter Paper, Grade 4V circles, diam. 32 cm, pack of 100
WHA1204240 Whatman® Prepleated Qualitative Filter Paper, Grade 4V circles, diam. 24 cm, pack of 100
WHA1204150 Whatman® Prepleated Qualitative Filter Paper, Grade 4V circles, diam. 15 cm, pack of 100
WHA1204125 Whatman® Prepleated Qualitative Filter Paper, Grade 4V circles, diam. 12.5 mm, pack of 100
WHA12040185 Whatman® Prepleated Qualitative Filter Paper, Grade 4V circles, diam. 18.5 mm, pack of 100
WHA1204270 Whatman® Prepleated Qualitative Filter Paper, Grade 4V circles, diam. 27 mm, pack of 14
WHA1004042 Whatman® qualitative filter paper, Grade 4 circles, diam. 42.5 mm, pack of 100
WHA1004055 Whatman® qualitative filter paper, Grade 4 circles, diam. 55 mm, pack of 100
WHA1004070 Whatman® qualitative filter paper, Grade 4 circles, diam. 70 mm, pack of 100
WHA1004090 Whatman® qualitative filter paper, Grade 4 circles, diam. 90 mm, pack of 100
WHA1004110 Whatman® qualitative filter paper, Grade 4 circles, diam. 110 mm, pack of 100
WHA1004125 Whatman® qualitative filter paper, Grade 4 circles, diam. 125 mm, pack of 100
WHA1004150 Whatman® qualitative filter paper, Grade 4 circles, diam. 150 mm, pack of 100
WHA1004185 Whatman® qualitative filter paper, Grade 4 circles, diam. 185 mm, pack of 100
WHA1004240 Whatman® qualitative filter paper, Grade 4 circles, diam. 240 mm, pack of 100
WHA1004270 Whatman® qualitative filter paper, Grade 4 circles, diam. 270 mm, pack of 100
WHA1004320 Whatman® qualitative filter paper, Grade 4 circles, diam. 320 mm, pack of 100
WHA1004400 Whatman® qualitative filter paper, Grade 4 circles, diam. 400 mm, pack of 100
WHA1004917 Whatman® qualitative filter paper, Grade 4 sheets, W × L 460 mm × 570 mm, pack of 100
WHA1004930 Whatman® qualitative filter paper, Grade 4 sheets, W × L 580 mm × 580, pack of 100
WHA1004648 Whatman® qualitative filter paper, Grade 4 roll, W × L 38 mm × 114 mm, pack of 1
WHA1004050 Whatman® qualitative filter paper, Grade 4 circles, diam. 50 mm, pack of 100
WHA1004047 Whatman® qualitative filter paper, Grade 4 circles, diam. 47 mm, pack of 100
WHA1004027 Whatman® qualitative filter paper, Grade 4 circles, diam. 27 mm, pack of 400
Z759791 Whatman® qualitative filter paper, Grade 4 circles, diam. 41 mm, pack of 100
WHA1004041 Whatman® qualitative filter paper, Grade 4 circles, diam. 41 mm, pack of 100