Whatman Grade 4 Qualitative Filter Papers

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ID	Product Name
28414013	Grade 4 Qualitative Filter Paper Standard Grade, circle, 110 mm
28414014	Grade 4 Qualitative Filter Paper Standard Grade, circle, 125 mm
28414015	Grade 4 Qualitative Filter Paper Standard Grade, circle, 150 mm
28414016	Grade 4 Qualitative Filter Paper Standard Grade, circle, 185 mm
28414017	Grade 4 Qualitative Filter Paper Standard Grade, circle, 240 mm
28414005	Grade 4 Qualitative Filter Paper Standard Grade, circle, 27 mm
28414018	Grade 4 Qualitative Filter Paper Standard Grade, circle, 270 mm
28414019	Grade 4 Qualitative Filter Paper Standard Grade, circle, 320 mm
28414021	Grade 4 Qualitative Filter Paper Standard Grade, circle, 400 mm
28414007	Grade 4 Qualitative Filter Paper Standard Grade, circle, 42.5 mm
28414008	Grade 4 Qualitative Filter Paper Standard Grade, circle, 47 mm
28414009	Grade 4 Qualitative Filter Paper Standard Grade, circle, 50 mm
28414010	Grade 4 Qualitative Filter Paper Standard Grade, circle, 55 mm
28414011	Grade 4 Qualitative Filter Paper Standard Grade, circle, 70 mm
28414012	Grade 4 Qualitative Filter Paper Standard Grade, circle, 90 mm
28414023	Grade 4 Qualitative Filter Paper Standard Grade, roll, 38 x 114 mm
28414029	Grade 4 Qualitative Filter Paper Standard Grade, sheet, 460 × 570 mm
28414031	Grade 4 Qualitative Filter Paper Standard Grade, sheet, 580 × 580 mm

Whatman Grade 4 Qualitative Filter Papers are a standard grade, high flow rate filter paper. They are useful in qualitative analytical separations when fast flow is required and the collection of fine particles is not critical.

These cellulose filters are used in qualitative analytical techniques to determine and identify materials (e.g., in air pollution monitoring).

Excellent retention: captures coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide
Fast filtration: useful for routine clean-up of biological fluids or organic extracts during analysis

Grade 4 Qualitative Filter Papers (20-25 µm particle retention) are available in a variety of sizes and formats including circles, sheets, and rolls. They are also available as prepleated filters, which give improved flow rate and increased loading capacity compared to equivalent flat filters.

How well do you know your filter paper grades and why you use them? To find out, read our blog Back to Basics Part 1: A Guide to Types of Whatman Filter Paper Grades. Ready for more? Read our 6-part blog series Whatman paper filtration 101 or our complete lab filtration blog.

For more information and help choosing from our wide range of filter paper grades, download our Filter paper and membranes guide or find your filter fast with our Whatman filter selector.

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Product	Product Name	Format All Roll Circles Sheets	Dimensions All 38 x 114 mm Ø 42.5 mm Ø 55 mm Ø 125 mm Ø 150 mm Ø 400 mm Ø 185 mm Ø 270 mm Ø 320 mm Ø 27 mm Ø 90 mm Ø 47 mm Ø 70 mm Ø 240 mm Ø 50 mm Ø 110 mm 580 x 580 mm (23 x 23 in) 460 x 570 mm (18.11 x 22.45 in)	Price
1004-648	Grade 4 Qualitative Filter Paper Standard Grade, roll, 38 x 114 mm	Roll	38 x 114 mm	53.54 USD	Add to cart In Stock Stock on request Limited stock
1004-930	Grade 4 Qualitative Filter Paper Standard Grade, sheet, 580 × 580 mm	Sheets	580 x 580 mm (23 x 23 in)	319.19 USD	Add to cart In Stock Stock on request Limited stock
1004-917	Grade 4 Qualitative Filter Paper Standard Grade, sheet, 460 × 570 mm	Sheets	460 x 570 mm (18.11 x 22.45 in)	280.44 USD	Add to cart In Stock Stock on request Limited stock
1004-400	Grade 4 Qualitative Filter Paper Standard Grade, circle, 400 mm	Circles	Ø 400 mm	216.19 USD	Add to cart In Stock Stock on request Limited stock
1004-240	Grade 4 Qualitative Filter Paper Standard Grade, circle, 240 mm	Circles	Ø 240 mm	77.61 USD	Add to cart In Stock Stock on request Limited stock
1004-270	Grade 4 Qualitative Filter Paper Standard Grade, circle, 270 mm	Circles	Ø 270 mm	101.80 USD	Add to cart In Stock Stock on request Limited stock
1004-320	Grade 4 Qualitative Filter Paper Standard Grade, circle, 320 mm	Circles	Ø 320 mm	146.14 USD	Add to cart In Stock Stock on request Limited stock
1004-110	Grade 4 Qualitative Filter Paper Standard Grade, circle, 110 mm	Circles	Ø 110 mm	18.75 USD	Add to cart In Stock Stock on request Limited stock
1004-027	Grade 4 Qualitative Filter Paper Standard Grade, circle, 27 mm	Circles	Ø 27 mm	53.54 USD	Add to cart In Stock Stock on request Limited stock
1004-125	Grade 4 Qualitative Filter Paper Standard Grade, circle, 125 mm	Circles	Ø 125 mm	24.05 USD	Add to cart In Stock Stock on request Limited stock
1004-090	Grade 4 Qualitative Filter Paper Standard Grade, circle, 90 mm	Circles	Ø 90 mm	14.76 USD	Add to cart In Stock Stock on request Limited stock
1004-070	Grade 4 Qualitative Filter Paper Standard Grade, circle, 70 mm	Circles	Ø 70 mm	12.05 USD	Add to cart In Stock Stock on request Limited stock
1004-185	Grade 4 Qualitative Filter Paper Standard Grade, circle, 185 mm	Circles	Ø 185 mm	45.53 USD	Add to cart In Stock Stock on request Limited stock
1004-042	Grade 4 Qualitative Filter Paper Standard Grade, circle, 42.5 mm	Circles	Ø 42.5 mm	9.39 USD	Add to cart In Stock Stock on request Limited stock
1004-150	Grade 4 Qualitative Filter Paper Standard Grade, circle, 150 mm	Circles	Ø 150 mm	30.76 USD	Add to cart In Stock Stock on request Limited stock
1004-047	Grade 4 Qualitative Filter Paper Standard Grade, circle, 47 mm	Circles	Ø 47 mm	10.72 USD	Add to cart In Stock Stock on request Limited stock
1004-055	Grade 4 Qualitative Filter Paper Standard Grade, circle, 55 mm	Circles	Ø 55 mm	12.05 USD	Add to cart In Stock Stock on request Limited stock
1004-050	Grade 4 Qualitative Filter Paper Standard Grade, circle, 50 mm	Circles	Ø 50 mm	12.04 USD	Add to cart In Stock Stock on request Limited stock
1004-041	Grade 4 Qualitative Filter Paper Standard Grade, 41 mm			9.39 USD	Add to cart In Stock Stock on request Limited stock

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Whatman Grade 4 Qualitative Filter Papers

Whatman Grade 4 Qualitative Filter Papers

Extremely high flow rate

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